Installation Instructions for Cold Weather Kit
For Packaged Units
Document Number: 506410-06
Revision Date: 12/2024
Supersedes: 506410-05
Product Overview
This document provides installation instructions for the Cold Weather Kit, designed for use with specific LG/LD/KG/KD 092-300 and SG 120 gas packaged units. The kit heats the gas heat compartment to allow gas valve operation during low outdoor temperatures.
Safety Warnings
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier.
WARNING
To prevent serious injury or death:
- Lock-out/tag-out before performing maintenance.
- If system power is required (e.g., smoke detector maintenance), disable power to the blower, remove the fan belt where applicable, and ensure all controllers and thermostats are set to the "OFF" position before performing maintenance.
- Always keep hands, hair, clothing, jewelry, tools, etc., away from moving parts.
CAUTION
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.
Application and Compatibility
The cold weather kit heats the gas heat compartment to allow gas valve operation during low outdoor temperatures. Refer to TABLE 1 for unit compatibility.
TABLE 1: Unit Compatibility
| Unit | Voltage | Part No. | Cat. No. |
|---|---|---|---|
| LGH/KG 092-152 | Y | 613930-01 | 13X63 |
| LGH/KG 092-152 | G, M | 613930-02 | 13X64 |
| LGM/LGT/LD/KG/KD 078-152 | J | 613930-03 | 13X65 |
| LGM/LGT/LD/KD 078-152 | Y | 613930-07 | 22A51 |
| LGM/LGT/LD/KD 078-152 | G, M | 613930-08 | 22A55 |
| LG/LD/KG 156-300(S) | Y | 613930-10 | 22H58 |
| LG/LD/KG 156-300(S) | G, M | 613930-11 | 22H59 |
| LG/LD/KG 156-300(S) | J | 613930-12 | 22V43 |
| SG 120 | G | 613930-14 | 31A65 |
| SG 120 | J | 613930-15 | 31A66 |
Shipping and Packing List
For units: 13X63, 13X64, 13X65, 22A51, 22A55, 31A65, 31A66
Package 1 of 1 contains:
- 1- Heater assembly
- 4- Wire harnesses (2 in 13X63 & 13X64)
- Bag assembly containing:
- 1-Relay
- 9-#8 Screws
- 1-Wire tie
For units: 22H58, 22H59, 22V43
Package 1 of 1 contains:
- 2- Heater assemblies
- 7- Wire harnesses:
- 1- 106051-01 (LGH units)
- 1- 604785-01 (KG Units- std. SCCR)
- 2- 106128-01 HR6 power harnesses (KG)
- 1- 105722-01 (LGH units - higher SCCR)
- 1- 106648-01 (LGM units)
- 1- 107210-01 (LGT/LDT units)
- 1- 108303-01 (LGT/LDT 302-360)
- Bag assembly containing:
- 2- Relays
- 18- Thread forming screws
- 24- Wire ties
Installation Instructions
Installation - LGH092-150 Units
- Disconnect all power to the unit and open the heat access panel.
- Locate the kit harness labeled 604954-01. Remove the cold weather kit cover and connect wires labeled HR6 to the cold weather assembly. Refer to FIGURE 1. Replace the cold weather kit cover. Discard harness labeled 604956-01 provided in the kit.
- Install the heater assembly in the heat section as shown in FIGURE 2. Use existing screws.
- Route the remaining harness wires as shown in FIGURE 2. Make wire connections as shown in FIGURE 1.
- Open the control access panel and install K125 as shown in FIGURE 3. Secure with #8 screws provided in the kit.
- Locate existing wires in the control box and connect to K125 as shown in FIGURE 3 for standard SCCR units and FIGURE 4 for high SCCR units.
FIGURE 1: Cold Weather Kit Wiring - LGH092-150. This diagram illustrates the electrical connections for the cold weather kit. It shows the Cold Weather Kit with terminals S59, S60, S61, and connectors P229/J229 and P228/J228. It depicts connections to the A3 Ignition Control, including A3-PWR, and the connection to the Unit Controller J/P266. It notes to connect wires to HR6 before installing the kit and to disconnect from A3 power and connect to the harness wire labeled A3-PWR.
FIGURE 2: Cold Weather Kit Wire Routing - LGH092-150. This diagram shows the physical routing of wires within the unit. It indicates routing J228 through a grommet and routing A3 power wires through a grommet. It shows the placement of the Cold Weather Kit, Combustion Air Inducer, and A3 Ignition Control, and highlights the connection point J228 to P228.
FIGURE 3: Control Area - LGH092-150 Standard SCCR Units. This diagram shows the control area layout and wiring for standard SCCR units. It depicts terminal blocks (K1, K2, K3, K10, K13, K65, K68), switches (S42), and relays (T1, T3, T43). It specifically illustrates the installation and terminal connections for the K125 relay, showing 'K125 Newer Model Units' and 'K125 Older Model Units' with terminal labels like K125-4, K125-7, K125-A, K125-B.
FIGURE 4: Control Area - LGH092-150 High SCCR Units. This diagram shows the control area layout and wiring for high SCCR units, similar to Figure 3 but with different components like F10 and F4, and illustrating the K125 relay connections.
Installation - KG, KD 092-150 Units
- Disconnect all power to the unit and open the heat access panel.
- Remove six screws that are holding the unit top to the compressor area corner mullion.
- Locate the kit harness labeled 604956-01 and identify six wires labeled K1-L1, K1-L2, K125-4, K125-7, K125-A, and K125-B. Route the six wires from the heat section through the side grommet to the control box. Refer to FIGURE 6. Discard harness labeled 604954-01 provided in the kit.
- Remove the cold weather kit cover and connect wires labeled HR6 to the cold weather assembly. Refer to FIGURE 7. Replace the cold weather kit cover.
- Install the heater assembly in the heat section as shown in FIGURE 2. Use existing screws.
- Open the control access panel and install K125 as shown in FIGURE 3. Secure with #8 screws provided in the kit.
- Make wire connections in the control box as shown in FIGURE 5 and in the heat section as shown in FIGURE 7.
- Replace the top panel and secure in place.
FIGURE 5: Control Area Wire Connections - KG, KD 092-150. This diagram illustrates the control area wiring for KG and KD 092-150 units. It shows terminal blocks and relays, and details the connections for the K125 relay, differentiating between 'K125 Newer Model Units' and 'K125 Older Model Units' with specific terminal labels (K125-4, K125-7, K125-A, K125-B).
FIGURE 6: Cold Weather Kit Wire Harness Routing - KG, KD 092-150. This diagram illustrates the physical routing of wires for the cold weather kit in KG and KD 092-150 units. It shows routing wires through conduit to the control box, routing kit harness wires through a heat section side grommet, and routing A3 power wires through a grommet. It labels components like the Cold Weather Kit, Combustion Air Proving Switch S18, and A3 Ignition Control.
FIGURE 7: Heat Section Wiring Connections - KG, KD 092-150. This diagram shows the wiring connections in the heat section for KG and KD 092-150 units. It depicts the Cold Weather Kit with terminals S59, S60, S61, and connectors P229/J229 and HR6. It shows connections to the A3 Ignition Control (A3-24, A3-GND) and notes to disconnect P229-5 from P229-6.
Installation - LGM, LGT, LDT 092-150 Units
- Disconnect all power to the unit and open the heat access panel. See FIGURE 8.
- Discard harnesses labeled 604954-01 and 604956-01. Locate the kit power harness which has two 2-pin connectors labeled J/P228.
- Remove the strip heater junction box cover. Route two power harness wires labeled HR6 through the junction box side grommet and connect to the strip heater terminals. See FIGURE 9. Replace the junction box cover.
- Install the heater assembly in the heat section as shown in FIGURE 10. Use existing screws.
- Remove the ignition control cover and install K125 as shown in FIGURE 10. Secure with #8 screws provided in the kit.
- Disconnect unit J/P425 connectors. See FIGURE 10. Connect power harness J/P228 to J/P425. See FIGURE 11.
- Route remaining power harness wires labeled K125-4, -6, -7, -9 through the grommets in the bottom of the ignition control box. Connect to appropriate terminals.
- Locate the kit control harness that has a 6-pin, 4-wire connector labeled P229. Connect P229 to J229 cold weather kit harness. See FIGURE 12.
- Route the other end of the P229 harness to the heat section and make wire connections. See FIGURE 13.
FIGURE 8: Cold Weather Kit - LGM, LGT, LDT, 078-150. This diagram shows the general layout and placement of the Cold Weather Kit components within the unit, including the Heater Assembly and Heat Section, relative to the Corner Mullion.
FIGURE 9: Connect Strip Heater Wires - LGM, LGT, LDT 078-150. This diagram illustrates the connection of strip heater wires. It shows the Strip Heater Junction Box, a grommet, and the Cold Weather Heater Assembly, with J/P228 harness wires labeled HR6-1 & -2 connecting to the strip heater terminals.
FIGURE 10: Install Heater Assembly - LGM, LGT, LDT 078-150. This diagram shows the installation of the heater assembly and other components within the unit. It labels the Cold Weather Kit, Combustion Air Inducer, K125 Relay, A3 Ignition Control, Ignition Control Box, and indicates the J/P425 Unit Connector to be disconnected.
FIGURE 11: J/P228 Power Harness - LGM, LGT, LDT 078-150 K125. This diagram shows the power harness connections for the cold weather kit. It illustrates the routing of the J/P228 harness, indicating connections to the HR6 Strip Heater and the K125 Relay, with specific connector labels (P245, J228, P228, J245).
FIGURE 12: J/P229 Control Harness - LGM, LGT, LDT 078-150. This diagram shows the control harness routing, indicating the connection of P229 to J229 and highlighting that Figure 13 provides the detailed wiring. It shows the K125 relay.
FIGURE 13: J/P229 Control Harness Connections - LGM, LGT, LDT 078-150. This detailed wiring diagram shows the connections for the control harness P229. It illustrates connections to the K125 Relay Coil (K125-A, K125-B), GND-1, GND, A3.POWER.M, A3.POWER.F, and unit harness connections including A55.P393-6 (LTVH-1) and A3 P406-5 (LTVH-2). It also indicates where to disconnect unit harness wires.
Installation - LGH156-300 Units
- Disconnect all power to the unit and open the heat access panel.
- Install both cold weather assemblies as shown in FIGURE 14. Use existing screws.
- Install both K125 relays in the control area above the compressors. Secure with #8 screws. See FIGURE 15.
- Locate harness labeled 106051-01 for standard SCCR units or 105722-01 for high SCCR units. Route as shown in FIGURE 15. Secure with wire ties. Discard unused harnesses.
- Make wire connections as shown in FIGURE 16.
- Use wire ties to securely route and tie the harness away from the gas heat manifold.
FIGURE 14: Cold Weather Kit Installation - LGH156-300 Units. This diagram shows the general placement and installation of the cold weather kit assemblies within the unit, indicating they should be secured with six thread forming screws.
FIGURE 15: Cold Weather Kit Wire Routing - LGH156-300S. This diagram illustrates wire routing for LGH156-300S units, especially for high SCCR units. It shows routing K125(1)-7 and K125(2)-7 to F10-Load-L1. It depicts the A55 Prodigy M2 and M3 Unit Controllers, and the location of A3 and A12. It also shows connectors P228, P229, P230 and their destinations (Left/Right Side Heat Exchanger).
FIGURE 16: Cold Weather Kit Wiring - LGH156-360. This diagram shows the wiring for the cold weather kit on LGH156-360 units. It illustrates disconnecting wires from the ignition board (A3 and A12) and connecting the kit harness to the A55 Prodigy 2.0 M3 Unit Controller. It also shows connections to the A55 Prodigy M2 Unit Controller and K14.
Installation - KG, KD 156-300 Units
- Disconnect all power to the unit and open compressor access panels.
- Install both cold weather assemblies as shown in FIGURE 14. Use existing screws.
- Install both K125 relays in the control area above the compressors. Secure with #8 screws. See FIGURE 17.
- Locate harness labeled 604785-01 and route as shown in FIGURE 17. Secure with wire ties. Discard unused harnesses.
- Make wire connections as shown in FIGURE 18.
- Use wire ties to securely route and tie the harness away from the gas heat manifold.
FIGURE 17: Cold Weather Kit Wire Routing - KG, KD 156-300. This diagram shows the wire routing for the cold weather kit in KG, KD 156-300 units. It depicts the placement of K125(1) and K125(2) relays, A3 and A12 controllers, and various terminal blocks (TB1, TB13) and connectors (P228, P229, P230) with their destinations (Left/Right Side Heat Exchanger).
FIGURE 18: Cold Weather Kit Wiring - KG, KD 156-300. This diagram illustrates the complex wiring and disconnections required for the cold weather kit in KG, KD 156-300 units. It shows disconnecting wires from the ignition board (A3 and A12) and from the K2 Contactor. It details connecting previously disconnected unit wiring to the kit harness, and notes the location of S47/S69 in the wire bundle below K125 relays. It also shows connections to Vestibule Heater Assemblies.
Installation - LGX 156-300 Units
- Disconnect all power to the unit and open the heat access panel.
- Install both cold weather assemblies as shown in FIGURE 14. Use six thread forming screws, provided.
- Install both relays as shown in FIGURE 19. Secure with #8 screws.
- Locate harness labeled 106648-01. Route as shown in FIGURE 19. Secure with wire ties. Discard unused harnesses.
- Make wire connections as shown in FIGURE 20 and FIGURE 21.
- Use wire ties to securely route and tie the harness away from the gas heat manifold.
FIGURE 19: Cold Weather Kit Wire Routing - LGX 156-300. This diagram shows the wire routing for the cold weather kit in LGX 156-300 units. It depicts the A55 M4 Unit Controller, K125 and K262 relays, and connectors P228 (1), P229, P228 (2), P230. It labels wires from the controller (A55.24VAC.1, A55.24VAC.2, A55.GND.1, A55.GND.2) and wires to F10 (F10.LOAD-T1, F10.LOAD-T2). It also shows LTVH-A1 & A2 and LTVH-B1 & B2 connectors.
FIGURE 20: Cold Weather Kit Wiring - LGX156-300. This diagram shows the wiring connections for the cold weather kit in LGX 156-300 units. It illustrates connections from the A55/M4 Unit Controller to K125 and K262 relays, and to F10. It shows connections to the unit harness via connectors P229 and P228 (1) for the left side, and P230 and P228 (2) for the right side. It references Figure 21 for connecting control harness leads.
FIGURE 21: Cold Weather Kit Wiring - (continued) LGX156-300. This diagram details the connection of control harness leads for LGX 156-300 units. It shows disconnecting LTVH-A1 from -A2 and LTVH-B1 from -B2. It illustrates inserting kit control harness leads (LTVH-A1 and LTVH-B1) and connecting them to the respective control wires labeled LTVH-A1 and LTVH-B1, connected to A3 and A12 Ignition Controls.
Installation - LGT/LDT 156-360 Units
- Disconnect all power to the unit and open the heat access panel.
- Install both cold weather assemblies as shown in FIGURE 14. Use six thread forming screws, provided.
- Install both relays as shown in FIGURE 22. Secure with #8 screws.
- Locate harness labeled 107210-01 (108303-01 for LGT/LDT 302-360). Route as shown in FIGURE 22. Secure with wire ties. Discard unused harnesses.
- Make wire connections as shown in FIGURE 22.
- Use wire ties to securely route and tie the harness away from hot surfaces (collector box cover, combustion blower, flue elbow, etc.).
FIGURE 22: Cold Weather Kit Wire Routing - LGT/LDT 156-300. This diagram shows the wire routing for the cold weather kit in LGT/LDT 156-300 units. It depicts the A55 Unit Controller, K125 and K262 relays, and connectors P229, P228 (1), P228 (2), P230. It labels wires from the controller (A55.24VAC.1, A55.24VAC.2, A55.GND.1, A55.GND.2) and wires to F10 (F10.LOAD-T1, F10.LOAD-T2). It also shows four wires labeled for K262 and indicates connections to the main control harness interconnect P432.
Installation - SG 120 Unit
- Disconnect all power to the unit and open the control access panel, see FIGURE 23.
- Install the heater and control assembly in the control compartment as shown in FIGURE 9. Secure with provided screws.
- Look for the harness labeled 107824-01 (already in the unit). Disconnect connector from P432.
- Make wire connection as shown in FIGURE 24.
Operation
- When ambient temperature drops below 20°F (-7°C), S61 closes.
- When ambient temperature drops below -10°F (-23°C), S60 closes to energize K125 and bring on HR6 heater.
- When ambient temperature rises to 20°F (-7°C), S60 opens to de-energize HR6 heater.
- When ambient temperature drops below -20°F (-29°C), S59 opens to disable GV1 gas valve.
- S59 closes to allow heating when temperature rises to 10°F (-12°C).
FIGURE 23: Cold Weather Kit SG. This diagram shows the layout of the SG 120 unit, indicating the Control Access and Compressor Access panels, and the placement of the Control Assembly and Heater Assembly.
FIGURE 24: Cold Weather Kit Wiring - SG. This diagram illustrates the wiring for the cold weather kit in SG units. It shows connections to the Unit Controller (P393), K125 relay, F10, P432, and A3 Ignition Control. It also depicts the Control Assembly with sensors S59, S60, S61, and the Heater Assembly with HR6 connections.
