Johnson Controls hl5, hc8, yzh, hl8, yze User Manual

REPAIR PART INSTALLATION MANUAL

HEAT PUMP COMMUNICATING CONTROL REPAIR KIT (S1-33102957000)

MODELS YZB, YZE, YZH, HL5, HC5, HL8, HC8

FIGURE 1: Demand Defrost Control Module

GENERAL INFORMATION

The YorkGuard VI Demand Defrost control as a replacement
part for prior versions of the YorkGuard contro l.

Following the detailed instructions for modifications of both
the indoor and outdoor units is critical.

NOTE: For direct replacement of YorkGuard VI, replace the
control only.

Service replacement kit consists of:

• YorkGuard “VI” Defrost Control.

CONTROL CONFIGURATION FOR
ALL APPLICATIONS

Most jumper settings should be set to match jumpers on board
being removed.

Remove control from packaging and configure the control as
follows:

1. Specify the desired Low Temperature Cut Out (LTCO)
using the jumper on the control.

2. Specify the desired Balance Point (BP) using the jumper on
the control.

3. Specify appropriate defrost curve using the jumper on the
control. See Table 1.

T ABLE 1: Defrost Initiate Curves

Defrost Curve

Selection

Jumper Position

YZB/HC3B/HL3B 2 & 2.5 Ton 4 & 5 Ton 3 & 3.5 Ton 1.5 Ton
YZE/HC5B/HL5B 2 Ton 4 & 5 Ton 3 Ton N/A

YZE03811 N/A N/A 3 Ton N/A

4. Verify that the Y2 LOCK jumper is set. This jumper is not
applicable to a single stage compressor system.

5. Specify if the Heat Pump is installed with a fossil fuel fur­nace using the FFUEL jumper. The jumper should be ON
for a fossil fuel furnace installation and OFF for an air han­dler installation.

6. Specify Switch Point jumper using the jumper on the con­trol.

7. Verify that the HOT HEAT PUMP is set appropriately.

8. Specify compressor delay using jumper on the control.
“ON” will shut-off compressor when entering and leaving
defrost.

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Johnson Controls Unitary Products 035-22286-001-A-0909

OUTDOOR UNIT MODIFICATIONS

1. Disconnect all high and 24V voltage power to the unit and
the control circuit.

2. Mark and disconnect all thermostat, sensor and low volt­age control connections from the YorkGuard IV control.

3. Remove the six #10 screws holding the control and remove
the control.

4. Using five of the six screws removed in Step 3, mount the
new board in place (omit the top middle screw).

5. Reconnect the wires removed in Step 2.

INDOOR UNIT MODIFICATIONS

NOTE: Indoor transformer should be rated for a min imum of
40VA. Replace transformer if necessary.

FOSSIL FUEL APPLICATION - The YorkGuard VI control does
not require an add-on fossil fuel kit. Remove existing fossil fuel
kit if present. An optional bonnet sensor may be used if desired.
See “OPERATION INSTRUCTIONS - “DEMAND DEFROST
CONTROL BOARD” on upgnet.com for details of functionality
with and without bonnet sensor installed.

START-UP OPERATION

1. Reapply power to the unit and the control voltage circuit.

2. The LED on the defrost control will flash on and off when
there is power to the control and it is working properly.

3. Verify unit operation.

For more information on control operation, refer to “OPER­ATION INSTRUCTIONS - “DEMAND DEFROST CONTROL
BOARD” on upgnet.com.

Subject to change without notice. Published in U.S.A. 035-22286-001-A-0909
Copyright © 2009 by Johnson Controls, Inc. All rights reserved. Supersedes:Nothing

Johnson Controls Unitary Products

5005 York Drive

Norman, OK 73069