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Component Tests 8 and 9
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
Test 8
Fit gauges to the discharge (high)
side access valve and observe the
discharge pressure.
Typical discharge pressure range is
600 – 2100kPa depending on the
storage tank water temperature.
A discharge pressure in excess of
2100kPa may indicate a low water
flow
rate
1800 kPa
refrigerant.
Note: Refer to the Refrigerant Charge
section
on
information on refrigerant charge and
refrigerant charge fault indications.
Test 9
Remove the insulation and hold the
TX valve bulb tightly by hand, to
increase the heat detected. The TX
valve should open with the following
results:
1. Suction
cooler.
2. Evaporator
should increase.
Remove
insulation. The TX valve should now
close, resulting in the reversal of the
above results.
Service. All printed copies are deemed uncontrolled.
or
an
overcharge
page
54
for
line
should
become
(suction)
pressure
hand
and
replace
of
more
the
51
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