Test Operation; Emergency Operation; Maintenance; Leak Test Line Set Connection - Johnson Controls DHPM09NWM42Q1 Installation Manual

898150-UIM-B-0113
LEAK TEST
Use the following procedure to test for system leaks:
1. Connect the manifold gauge set and dry nitrogen gas cylinder to the
suction/vapor service port. See Figure 30.
2. Open valve on nitrogen cylinder.
3. Pressurize the system to no more than 150 PSIG with dry nitrogen.
4. Check for leaks using soapy water.
5. After the system is found to be free of leaks:
• Close valve on nitrogen cylinder
• Relieve the nitrogen pressure by: loosening the charge hose con-
nector at the nitrogen cylinder.
• When the system pressure is reduced to normal, disconnect the
hose from the cylinder.
CHECK PLACES FOR
FLARE NUT CONNECTIONS
(INDOOR UNIT)
CHECK PLACES
FOR OUTDOOR UNIT
FIGURE 43: Leak Test Line Set Connection
SECTION XVIII: TEST OPERATION
1. Check that all tubing and wiring have been properly connected.
2. Check that the gas and liquid side service valves are fully open.
GAS LEAK TEST
Check the flare nut connections for gas leaks with a gas leak detector
and/or soapy water.
RUNNING TEST
1. Turn power on by pressing "ON/OFF" button on the wireless remote
control to start system operation.
2. Press MODE button to select COOL, HEAT or FAN to check the
system operation.
INDOOR UNIT RUNNING TEST
1. Check if operation of each button on the remote control is working
normally and check the corresponding operating indication LED on
the indoor unit to make sure they match.
2. Check the operation of indoor unit louver and make you check its
swinging function.
3. Check the condensate drain and make sure there are no leaks.
OUTDOOR UNIT RUNNING TEST
1. Make sure there are no abnormal noises or vibration during opera-
tion.
2. Make sure you check for gas leaks.
SECTION XIX: EMERGENCY OPERATION
If the wireless remote is lost or damaged, the system can be operated
using the manual switch or code switch. The system will run in Auto
Run mode, and will not change the temperature setting nor the fan
speed.
The manual switch can be operated as follows:
• To operate the unit, press the AUTO/STOP button once and the
unit will enter into AUTO RUN mode. The microcomputer will
select the (COOL, HEAT, FAN) mode automatically to maintain
optimum room comfort.
• To stop the unit from operating, press the AUTO/STOP button
once and the unit will shut down.
The code switch can be operated as follows:
20
• To operate the unit, adjust the code switch to the AUTO position
and the unit will enter into AUTO RUN mode. The microcomputer
will select the (COOL, HEAT, FAN) mode automatically to main-
tain optimum room comfort.
• To stop the unit from operating, adjust the code switch to the
STOP position and the unit will shut down.
NOTICE
The TEST button is for the technicians' testing, which should not be
used by our user.
FIGURE 44: Emergency Operation
SECTION XX: MAINTENANCE
OUTDOOR UNIT
1. Ensure power is off before cleaning.
2. It may be necessary to wash the outdoor coil more frequently if it is
exposed to substances which are corrosive or which block airflow
across the coil (e.g., pet urine, cottonwood seeds, fertilizers, fluids
that may contain high levels of corrosive chemicals such as salts).
3. Outdoor Coil (Sea Coast) - Moist air in ocean locations can carry
salt, which is corrosive to most metal. Units that are located near
the ocean require frequent inspections and maintenance. These
inspections will determine the need to wash the unit including the
outdoor coil. Consult your installing contractor for proper intervals/
procedures for your geographic area or service contract.
4. Outdoor unit fan motor is pre-lubricated and sealed. No further
lubrication is needed.
5. Visually inspect all connecting lines, joints and coils for evidence of
oil leaks.
6. Check all wiring for loose connections.
7. Check for correct voltage at unit (unit operating).
INDOOR UNIT
1. Clean or change filters.
2. Check all wiring for loose connections.
3. Check for correct voltage at unit (blower operating).
4. Clean coil, if necessary.
5. Check connecting lines and coils for signs of oil leaks.
6. Check condensate line and clean, if necessary.
NOTICE
The filter must be in place and the front panel must be closed any
time the unit is in operation.
AUTO/STOP
MANUAL SWITCH
AUTO
TEST
RUN
STOP
CODE SWITCH
Johnson Controls Unitary Products