JDTMECH01 Line Voltage Thermostats
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Specifications:
- Product Name: JDTMECH01 & JDTMECH02 Line Voltage
Thermostats - Designed for: Heating, Ventilating, and Refrigeration
Applications - Enclosures: High Strength Plastic, NEMA 4X Rated
- Mounting: Indoors or Outdoors (protected from rain, not for
standing water or submersion) - NEC Rating: Suitable for use in agricultural buildings
Product Usage Instructions:
General Safety Information:
WARNING: Disconnect all power before installing
or servicing the product. Lock the power disconnect in the open
position if out of view and tag it to prevent unexpected restarting
of power to avoid fatal electric shock.
Grounding:
Ensure proper grounding by checking with a qualified
electrician. Pay special attention to grounding information on the
product and associated equipment.
Electrical Ratings:
Confirm that the electrical ratings of the thermostat match the
power source and loads being controlled. Use suitable rated relays
or motor starters for loads exceeding the thermostat rating.
Installation:
Install permanently in accordance with NEC, local codes, and
ordinances. All wiring should be done by a qualified electrician
using copper wire only.
Usage Restrictions:
Avoid use in dangerous locations like flammable, explosive
areas, or wet atmospheres. Use only for heating, ventilating, and
refrigeration applications.
Backup System:
For critical applications, install an approved temperature limit
wired in series with the thermostat. Consider using a second
thermostat with alarm contacts for redundancy in less critical
applications.
Frequently Asked Questions (FAQ):
Q: Can these thermostats be submerged in water?
A: No, these thermostats are not designed to be
submerged in water. They are protected from rain but should not be
exposed to standing water.
Q: What should I do if the power disconnect is out of
view?
A: Lock the power disconnect in the open
position and tag it to prevent unexpected restarting of power.
Always ensure power is disconnected before installation or
servicing.
Q: Can these thermostats be used in chemical laden areas?
A: No, these thermostats must not be used in
potentially dangerous locations such as chemical laden areas. They
are intended for general heating, ventilating, and refrigeration
use only.
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JDTMECH01 & JDTMECH02 Line Voltage Thermostats
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. Failure to comply with instructions could result in personal injury and/or property damage! Retain instructions for future reference.
Description These Line Voltage Thermostats are designed for reliable use in heating, ventilating, and refrigeration applications.
Models made with high strength plastic enclosures are NEMA 4X rated, and may be mounted indoors or outdoors. These models are protected from rain and may be washed down with a hose but must not be exposed to standing water or be submerged. Models rated in accordance with NEC547 are suitable for use in agricultural buildings.
Model numbers and electrical ratings are found on the underside of the access plate attached to the thermostat.
GENERAL SAFETY INFORMATION WARNING
Disconnect all power before installing or servicing this product. If the power disconnect is out of view, lock it in the open position and tag it to prevent unexpected restarting of power. Failure to do so could result in fatal electric shock.
1. Special attention must be given to any grounding information on this product and to other equipment associated with its installation and use. To ensure a proper ground, the grounding means must be checked by a qualified electrician.
2. Be certain that the electrical ratings of the thermostat conform to the power source and the load(s) being controlled. Loads that exceed the rating of the thermostat should be handled with a suitable rated relay or motor starter.
WARNING
Do not depend upon the thermostat as the sole means of disconnecting power when installing or servicing the product it is controlling. Always disconnect power at the main circuit breaker as described above. Failure to do so could result in fatal electric shock.
3. This thermostat is intended ONLY for permanent installation in accordance with the United States National Electrical Code (NEC), all applicable local codes and ordinances, and all sections of this manual. All wiring should be done by a qualified electrician, using copper wire only.
WARNING
These thermostats are intended for general heating, ventilating, and refrigeration ONLY. They must NOT be used in potentially dangerous locations such as flammable, explosive, chemical laden areas or in wet atmospheres.
WARNING
These thermostats are designed for use as operating controls only. Where an operating control failure would result in personal injury and/or loss of property, it is the responsibility of the installer to add devices (safety, limit controls) or systems (supervisory alarm systems) that protect against, or warn of control failure.
WARNING
In cases where personal injury or property damage may result from malfunction of the thermostat, a backup system must be used. Where critical or high value products are maintained, an approved temperature limit should be wired in series with this thermostat. In less critical applications, a second thermostat with alarm contacts may be used for redundancy.
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Page 1/7
INSTALLATION
LOCATION
Mount this product 5 to 6 feet (1.5 to 1.8 m) above the floor so it will be exposed to the average temperature of the controlled space. Do not mount control where it could be affected by unusual heat or cold such as in sunlight or beside equipment. Avoid locations near a door, window or other opening. Do not mount on an outside wall.
WARNING
Do not allow the thermostat to be placed on the floor where it could come in contact with moisture, or be stepped on. Doing so could result in a fatal electric shock.
These thermostats are designed for use in wet or humid environments. They meet NEMA 4X requirements when used with approved watertight connectors (not included).
To ensure water tightness, a UL listed cord seal or conduit hub marked “4X” should be tightened onto the conduit before installing in the enclosure. A drip loop must be used to prevent moisture from entering the thermostat housing. Make certain that all connectors are securely tightened.
When reinstalling the cover, make sure it is squarely positioned over the gasket. Then uniformly tighten the screws, evenly compressing the gasket to provide a watertight seal. Do not over tighten.
WIRING FOR SINGLE STAGE THERMOSTAT – JDTMECH01
MOUNTING FIXED INSTALLATIONS
Four mounting holes for fixed installations are found in the back of the case. On rough surfaces use the top mounting holes only. When mounting this control on uneven surfaces, when all four mounting screws are tightened, the housing may deform enough to affect the thermostat calibration and operation.
CAUTION
Do not dent or deform the sensor coil of this control. A dent or deformation will change the calibration and cause the control to cycle at a temperature lower than the knob setting.
THERMOSTAT WITH CORD AND 3-PRONG PLUG
IMPORTANT: All wiring should be done in accordance with applicable codes, ordinances and regulations. Use a disconnect device and overload protection to assure safe installation complying with local and national codes. Use copper conductors only.
Figure A
Adjusting Knob
NOTE: Letters R, B and Y (red, blue and
Y
yellow) refer to color of paint dots near
Green
B
terminals and wire colors (see Figure A).
Screw & Wire
R
(Ground)
Figures 1, 2 and 3 illustrate typical wiring for control of heating, cooling, refrigeration, and combination heating/cooling control systems (use copper conductors only).
Red Dot & Wire
(Power)
Yellow Dot & Wire
(Cool) Blue Dot & Wire (Heat)
CAUTION
To reduce the risk of electric shock, this product has a grounding type plug that has a third (grounding) pin. This plug will only fit into a grounding type power outlet. If the plug does not fit into the outlet, contact a qualified electrician to install the proper outlet. Do not change the plug in any way.
Certain thermostats are supplied with a cord and series plug for easy connection to a 120V AC grounded receptacle. Hang the thermostat near a 120V three prong receptacle with a ground pin using the hanging wire included in the package. Plug the male prongs into the receptacle and then plug the controlled equipment into the female part of the plug. For best results do not locate the thermostat near an exterior wall or window and away from the discharge of the equipment. If an extension cord is required use only one with a grounded 3 prong plug and 14 gauge wire.
Figure 1 Connection for a Typical Heating Control Circuit (B – open on temp. rise)
Green Wire to Ground
Adjusting Knob
Y Remove or Cap
B
Yellow Wire
R
Red Wire to Power Supply
Blue Wire to Heating System
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
(C) Common
Page 2/7
Figure 2
Connection for a Typical Refrigeration, Ventilation or Cooling Control Circuit (Y – close on temp. rise)
Adjusting Knob
Green Wire to Ground
Y
Remove/Cap
B
Blue Wire
R
Red Wire to Power Supply
Yellow Wire to Fan Motor or Refrigeration Unit
(C) Common
Figure 3 SPDT Thermostats in Control of Heating and Ventilation Systems
Green Wire to Ground
Adjusting Knob
Y B R
Red Wire to Power Supply
Heating System (C) Common
Vent Fan or Cooling System
TESTING PROCEDURE FOR SINGLE STAGE – JDTMECH01
Before leaving the installation, a complete operating cycle should be observed to ensure that all components are functioning properly. Check for correct operation in the following sequence:
1.When thermostat is connected to refrigeration, ventilating, or cooling systems: 1) Turn knob clockwise to a setting warmer than ambient temperature. — Fan or cooling system should be off 2) Turn knob counterclockwise (to cooler than ambient temperature setting) — Fan or cooling system should turn on.
2.When thermostat is connected to a heating device or system: 1) Turn knob clockwise above the ambient temperature — The heating unit should be on 2) When knob is turned counterclockwise (to lower temperature setting) — The heating unit should turn off approximately at the knob setting
NOTE: No Replacement parts available. Do not attempt any field repair.
WIRING FOR TWO STAGE THERMOSTAT – JDTMECH02
IMPORTANT: All wiring should be done in accordance with applicable codes, ordinances and regulations. Use a disconnect device and overload protection to assure safe installation complying with local and national codes. Use copper conductors only
NOTE: Letters R, B and Y (red, blue and yellow) refer to color of paint dots near terminals but not necessarily the color of the wire (see Figure B).
Figure B
Switch Control (HI) (High temperature)
Yellow Dot & Wire
(Cool)
Blue Dot & Wire
(Heat)
Adjusting Knob
YY BB RR
Red Dot & Wire
(Power)
Green Screw & Wire
(Ground)
Switch Control (LO) (Low temperature) Yellow Dot
With Black Wire
(Cool)
Blue Dot With
Brown Wire (Heat)
Jumper
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Page 3/7
Figure 4a, 4b, & 4c shows wiring for controlling a two-speed ventilating fan. When the control element reaches the knob settings, the low temperature switch starts the fan on low speed. If the ambient temperature continues to rise, the high temperature switch supplies power to the high-speed motor winding.
Figure 5a and 5b shows a typical SPDT/SPDT connection for a two-stage ventilation application. The damper motor will be energized when the temperature reaches the knob setting. If the temperature continues to rise, the fan motor will be energized by the high temperature switch.
Figure 5a
Figure 4a
Figure 4b
(HI) Yellow Wire Blue Wire Red Wire
Adjusting
Knob
(LO)
Adjusting
(HI)
Knob
YY BB RR
Black Wire
Yellow Wire
Remove Brown Wire
YY BB RR
Green
Remove factory
Wire
installed jumper
Red Green Wire Wire
Adjusting
(HI)
Knob
(LO)
(LO) Black Wire
Connect Blue Wire to Red Dot Terminal on Switch Control (LO)
Yellow Wire
Remove Blue Wire
Red Wire
YY BB RR
Black Wire
Remove Brown Wire
Green
Jumper
Wire
Figure 5b Shows two-stage SPDT/SPDT Thermostat in control of a singlespeed ventilating fan and volume increase damper motor
IS328-24C
Figure 4c
Black Wire to Low Speed
Fan
(HI)
Motor
Yellow Wire to High Speed
Adjusting
Knob
(LO)
YY BB RR
Figure 5b
Damper Motor
or Second Fan
Motor
Black Wire (HI)
Fan Yellow Wire Motor
Adjusting
Knob
(LO)
YY BB RR
Green Wire to Ground Red Wire to L1 L2/Common
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Jumper Green Wire to Ground
Red Wire to L1 L2/Common
Page 4/7
SPDT/SPDT units can also be used to control a combination heating and ventilating/cooling system, as shown in Figure 6a & 6b. When knob is set warmer than ambient temperature cooling will turn on. When knob is set cooler than ambient temperature heating will turn on. Once ambient temperature is reached a drop or increase of 3ºF is needed to activate device.
Figure 6a
Figure 7a & 7b illustrates typical wiring for SPDT/SPDT units for control of two heating stages. As the ambient temperature decreases to the knob setting, the high temperature switch will make Red-Brown wire or Blue dot, Yellow dot contact, turning on the first stage of heating. If the temperature continues to drop (about 3ºF) the low temperature switch will make Red-Blue contact, turning on the second stage of heating.
Figure 7a
Adjusting
(HI)
Knob
(LO)
Yellow Wire
Remove Blue Wire
Red Wire
YY BB RR
Remove Black Wire
Brown Wire
Green Wire
Jumper
Figure 6b Two-stage SPDT/SPDT Thermostats with automatic changeover in control of heating and cooling systems
Figure 6b
Adjusting
(HI)
Knob
(LO)
Remove Yellow Wire
Blue Wire
Red Wire
YY BB RR
Remove Black Wire
Brown Wire
Green
Jumper
Wire
Figure 7b Two-stage SPDT/SPDT Thermostats in Control of a Two-stage Heating System
Figure 7b
Heating Motor
or
Brown Wire
(HI)
Adjusting
Knob
(LO)
System
YY
BB
Ventilation or
Cooling System
Black Wire
RR
Second Stage Brown Wire of Heating Motor
(HI)
or System
First Stage of Heating Motor
Blue Wire
or System
Adjusting
Knob
(LO)
YY BB RR
Jumper Green Wire to Ground
Jumper Green Wire to Ground
Red Wire to L1
Red Wire to L1
L2/Common
L2/Common
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Page 5/7
OPERATIONAL SEQUENCE OF TWO STAGE THERMOSTAT
Figure 8 illustrates the operation of thermostat with SPDT/SPDT 2 Stage switching. On a temperature increase to the knob setting, the (LO) YR circuit closes. Simultaneously opening the (LO) BR circuit.
On a further increase in temperature the (HI) YR circuit closes. Simultaneously opening the (LO) BR circuit.
The reverse sequencing takes place with a decrease in temperature.
NOTE: No Replacement parts available. Do not attempt any field repair.
Figure 8
(HI)
Y
YR (HI) closes
B
R BR (HI) opens
Temperature fall
(LO)
Y
YR (LO) closes
B
R BR (LO) opens
Temperature setting
Stage #2
Stage #1
YR (HI) opens
BR (HI) closes
YR (LO) opens
Temperature rise
BR (LO) closes
Figure 8 Operational Sequence of Two-stage SPDT/SPDT Thermostats
(HI) Y B R
(LO) Y B R
TESTING PROCEDURE FOR TWO STAGE – JDTMECH02
Before leaving the installation, a complete operating cycle should be observed to ensure that all components are functioning properly. Check for correct operation according to the chosen connection/s wired for.
If wiring is the same as Figure 4c for controlling a two-speed ventilating fan 1) When knob is turned to approximately ambient temperature — Fan should start up 2) As knob is turned counterclockwise to a lower temperature setting — Fan should change to high speed 3) The devices should act in reverse sequence when the knob is turned clockwise
If wiring is the same as Figure 5b for a two-stage ventilation application 1) When knob is turned to approximately ambient temperature — Damper motor should be energized 2) As knob is turned counterclockwise to a lower temperature setting — Fan should start up 3) The devices should act in reverse sequence when the knob is turned clockwise
If wiring is the same as Figure 6b for controlling a combination heating and ventilating/ cooling system
1) When knob is set warmer than ambient temperature — Cooling will turn on
2) When knob is set cooler than ambient temperature — Heating will turn on
3) Once ambient temperature is reached — Neither heat or cool should systems should be on — A drop or increase of 3ºF in the ambient temperature is needed to activate the corresponding heating or cooling system
If wiring is the same as Figure 7b for control of two heating stages 1) When knob is turned to approximately ambient temperature — Stage #1 of heating system should start up 2) As knob is turned counterclockwise to a lower temperature setting — Stage #2 of heating system should start up
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Page 6/7
TROUBLESHOOTING
__Is_s_u_e______________P_o_s_s_i_b_le__C_a_u_s_e_/_s______________S_o_l_u_ti_o_n_/_s___________
__C_o_ol_in_g__o_r _F_an_______________________________________________________
Does not operate
1. Improper wiring
1. Check wiring
___________________2_._K_n_ob__se_t_a_b_o_v_e_a_m_b_ie_n_t _te_m_p_.______2_. _S_et_k_n_o_b_t_o_lo_w_e_r_t_e_m_p_. _
Runs continuously 1. Improper wiring
1. Check wiring
___________________2_._K_n_ob__se_t_b_e_lo_w__a_m_b_ie_n_t_te_m_p_.______2_. _S_et_k_n_o_b_t_o_h_ig_h_e_r _te_m_p_._
__O_pe_r_a_te_s_i_n_re_v_e_rs_e_____Im__pr_o_p_er_w__ir_in_g__________________C_h_ec_k_w__ir_in_g___________
__H_e_a_ti_n_g _U_n_it________________________________________________________
Does not operate
1. Improper wiring
1. Check wiring
___________________2_._K_n_ob__se_t_b_e_lo_w__a_m_b_ie_n_t_te_m_p_.______2_. _S_et_k_n_o_b_t_o_h_ig_h_e_r _te_m_p_._
Runs continuously 1. Improper wiring
1. Check wiring
___________________2_._K_n_ob__se_t_a_b_o_v_e_a_m_b_ie_n_t _te_m_p_.______2_. _S_et_k_n_o_b_t_o_lo_w_e_r_t_e_m_p_. _
Operates in reverse Improper wiring
Check wiring
WARRANTY
J&D Mfg. warrants this product is free from defects in materials and workmanship under normal use for the period of one year from date of purchase. Our warranty does not cover ordinary wear and tear. J&D Mfg can repair or replace at our option, any product or part of the product that is found to be defective. Our warranty applies to materials only and does not include return freight, delivery, loss or damage to personal property, cost of removal or installation, any incidental or consequential damages or labor. This warranty does not apply to products which are misused, abused, altered, improperly installed or subject to negligence. All warranties must be approved through our warranty department. The original purchaser must present a copy of the invoice for the defective product.
IS328-24C
J&D Manufacturing · 6200 Hwy 12 · Eau Claire, WI 54701 · 1-800-998-2398 · www.jdmfg.com
Page 7/7
Documents / Resources
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J and D JDTMECH01 Line Voltage Thermostats [pdf] Instruction Manual JDTMECH01, JDTMECH02, JDTMECH01 Line Voltage Thermostats, JDTMECH01, Line Voltage Thermostats, Voltage Thermostats, Thermostats |