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CAUTION
Before testing the relief valve,
make certain the discharge
pipe is properly connected to
the valve outlet and arranged
to contain and safely dispose
safely dispose
of water to an open drain.
of water to an open drain.
NOTE
The limited warranty provided
with the water heater does not
cover defects, malfunctions
or failures resulting from
water conditions that are
not in accordance with the
specifications in the table 3.
USER'S INFORMATION MANUAL
TANKLESS WATER HEATER 199
Relief Valve - Maintenance and Testing
The field-supplied relief valve manufacturer requires that under normal operating
conditions a "try lever test" must be performed once a year .
conditions, or if corrosion and/or deposits are noticed within the valve body, you
must test more often . Also perform a "try lever test" at the end of any non-service
period .
Test at or near maximum operating pressure by holding the test lever fully open
for at least 5 seconds to flush the valve seat free of sediment and debris. Then
release the lever and permit the valve to snap shut .
If the lever does not activate, or there is no evidence of discharge, discontinue
use of equipment immediately, and contact a licensed contractor or qualified
service personnel .
If the relief valve does not completely seal, and fluid continues to leak from
the discharge pipe, perform the test again to try and flush any debris that may
be lodged in the valve . If repeated attempts fail to stop the leakage, contact a
licensed contractor or qualified service personnel to replace the valve.
Domestic Hot Water System
Quality of the domestic cold water is very important to the longevity of the unit .
The recommended pH of the domestic water is between 6 .5 and 8 .5 . The internal
domestic water heat exchanger tubing and the flow sensor is subject to fouling if
exposed to hard water (over
or higher . See Table 3.
DESCRIPTION
Water Pressure
Programmable Water Temperature
Minimum DHW Flow Rate to Initiate
Operation
pH
Total Dissolved Solids (TDS)
Total Hardness
Aluminum
Chlorides
Copper
Iron
Manganese
Zinc
Table 3: Domestic Water Quality Guidelines
once a year . Under severe service
grains of hardness) or has a TDS of 500mg/L
11 .68
MAX
150 PSI
149°F (65°C)
N/A
8 .5
500 mg/L
250 mg/L
14 .6 gr/gal
0 .2 mg/L
250 mg/L
1 mg/L
0 .3 mg/L
0 .05 mg/L
5 mg/L
MIN
40 PSI
105°F (40°C)
0 .5 GPM
6 .5
0 .05 mg/L
13
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