Rheem 325 II Series Service Instructions Manual page 35

Fault Finding: Chart 5
5
Insufficient Hot Water
Has the supply of hot water
recently been significantly
depleted?
NO
Is the T&PR valve continuously
discharging water?
NO
Is the water temperature at the
T&PR valve 60ºC or higher?
YES
Is a tempering valve fitted?
YES
6
TM077: 325 & 410 Series II Heat Pump Service Instructions
Rev 00: Issued April 2014
This document is stored and maintained electronically by
YES
Is the water pressure more than
YES
80% of the T&PR valve rating?
NO
Is the correct T&PR valve fitted?
YES
Is the tank sensor working?
NO
TEST 1
YES
Is the heater of sufficient capacity
for the customer‟s needs?
YES
Is the heater connected to an
NO
off peak tariff?
NO
Are there any plumbing leaks,
crossed water connections or
dripping taps?
NO
1. Pressure limiting valve missing or
YES
Fit or replace pressure limiting valve.
2. Replace the T&PR valve if required.
Replace the T&PR valve with one of
NO
NO
NO
YES
YES
2. Isolate crossed water connections.
Service. All printed copies are deemed uncontrolled.
The water heater may take up to 12
hours to fully recover, depending on
the ambient temperature.
faulty.
the correct pressure rating.
Do NOT use reconditioned T&PR
valves.
1. Check for a crossed water
connection.
2. Replace the T&PR valve.
Replace the tank sensor.
Recommend a water heater of
sufficient capacity to meet the
customer‟s needs.
The heat pump is not suitable for
off peak connection. Connect to
continuous tariff or off peak 2,
if available.
1. Repair leaks.
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