Johnson Controls H Series Manuale utente

6096433-UAI-B-0721

Field Kit Installation Manual: H Series - Horizontal

Discharge Modulating Heat Pump Furnace and VS ECM

Compatibility Kit (HMH7AK002)

General

NOTICE

Before installation of this kit, see Table 1 to determine

if this kit applies to the selected outdoor model. If the

outdoor model is not listed in Table 1, this kit cannot

be applied correctly to link an air handler to a H Series

modulating discharge unit.

Table 1: Compatible models

Models

HMH72B241S

HMH72B361S

HMH72B481S

HMH72B601S

This kit is required to run a Johnson Controls air handler

with a H Series modulating heat pump. If you are pairing

this outdoor unit with a gas furnace, the room thermostat

must be a heat pump thermostat that can manage

fossil fuel operation. The purpose of the kit is to provide

necessary parts for installation and allow the H Series

outdoor section to reduce airflow from the indoor unit

when the outdoor terminal S1 is energized. The H Series

outdoor section is designed for lower airflow when S1 is

energized and does not function correctly without this

kit. The kit also reverses the logic of the reversing valve to

allow the indoor section unit to function according to the

same mode as the outdoor section.

Kit contents

Table 2: Kit contents

Item Quantity

Relay plate 1

SPDT 24-V relays 2

5-wire 36-in. harness 2

#8 x 1/2-in. screw 4

#12 x 3/4-in. screw 4

Instruction sheet 1

Wiring diagram VS ECM/furnace 1

Drier 1

Installation overview

1. Install the bi-flow filter/drier included when the

indoor equipment is in place at a suitable location

near the indoor section.

2. Remove the screws that secure the blower door of

the indoor section and remove the door.

3. Install the relays provided before wiring the

thermostat to the indoor and outdoor sections,

but after mechanical installation of both pieces of

equipment. You must install the relays in the indoor

section and connect the relays into the thermostat

wiring using wire connectors. See Installing the relay

plate for air handlers, Installing the relay plate for

furnaces, Wiring the S1 relay, and Wiring the RV relay

for detailed instructions.

4. When the relay plate is secured, and all field wiring

is connected, replace and secure the blower door in

reverse order of removal.

5. Proceed with the startup instructions in the

Installation Manual for the HMH7 series.

Installing the relay plate for air handlers

1. Remove the screw at the front of the control panel

securing the transformer. Without removing the

transformer wiring, move the transformer to the

side to allow access.

2. Install the relay plate on the right-hand side using

the existing four screw holes on the rear of the

control panel with the #12 screws provided. See

Figure 1.

Note: The relays shown in Figure 1 may be

different form factors from the relays you

receive, depending on part availability.

3. When the relay plate is in place, reinstall the

transformer.

Johnson Controls Ducted Systems

Figure 1: Air handler relay plate installation

Installing the relay plate for furnaces

1. Use a 3/16-in. drill bit to drill out the four holes

required. Use the relay plate as a template for

aligning the hole locations.

2. To attach the relay plate, insert the #12 screws

provided from the outside of the casing in. See

Figure 2.

Note: The relays shown in Figure 2 may be

different form factors from the relays you

receive, depending on part availability.

Figure 2: Furnace relay plate installation

Wiring the S1 relay

About this task: The S1 relay is the relay located nearest

the relay plate mounting flange without the notch.

NOTICE

The harnesses contained in the kit have different size

connectors on each end. Pay close attention to the

connectors so the correct ones are removed.

1. On the first five-wire harness, remove the 1/4-in.

connectors from the relay harness wires and strip

the insulation.

2. Attach the harness as follows. See Figure 3.

a. Connect the yellow wire to the room

thermostat Y connection.

b. Connect the red wire to terminal S1 of the

outdoor section.

c. Connect the blue wire to the C connection (C

on the indoor control).

d. Connect the black wire to the Y/Y2 connection

(Y/Y2 on the indoor control).

e. Connect the gray wire to the Y1 connection (Y1

on the indoor control).

Field Kit Installation Manual: H Series - Horizontal Discharge Modulating Heat Pump Furnace and VS ECM Compatibility

Kit (HMH7AK002)

Johnson Controls Ducted Systems

Wiring the RV relay

About this task: The RV relay is the relay located nearest

the notch in the relay plate mounting flange.

1. On the second five-wire harness, remove the 1/4-

in. connector from the relay harness wires and strip

the insulation.

2. Attach the harness as outlined in the following

steps. See Figure 3.

Note: The yellow wire in this harness is not

used.

a. Connect the red wire to the R connection (R

on the indoor control).

b. Connect the blue wire to the C connection (C

on the indoor control).

c. Connect the gray wire to the O connection (O

on the indoor control).

d. Connect the black wire to the room

thermostat O/B (reversing valve) wire.

Wiring diagram

Figure 3: Wiring diagram

Field Kit Installation Manual: H Series - Horizontal Discharge Modulating Heat Pump Furnace and VS ECM Compatibility

Kit (HMH7AK002)

Johnson Controls Ducted Systems

Subject to change without notice. Published in U.S.A.

Johnson Controls Ducted Systems

York International Corporation, 5005 York Drive, Norman, OK 73069

6096433-UAI-B-0721

Supersedes: 6096433-UAI-A-0521

2021-07-19

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