Table of Contents
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Index
Index
1
Warning
2
2.1
520 HN specifications (Technical data)
2.2
2.3
General rules to follow for safe operation
2.4
3
3.1
Introduction
3.2
Proper location for installing your heater
3.3
Venting
3.4
3.5
Mounting Heater
3.6
Gas piping & connections
3.7
3.8
Water connections
3.9
4
Operation instructions
4.1
For your safety, read before operating your water heater 14
4.2
4.3
To turn off appliance
4.4
Adjusting the water temperature
4.5
4.6
Draining the appliance
5
5.1
Maintenance intervals
5.2
Water valve
5.3
Pilot
5.4
5.5
Vent assembly
5.6
Mineral scale build-up
6
6.1
Introduction
6.2
No spark at pilot with water flow
6.3
Spark appears when hot water is turned on,
but pilot and burners will not ignite
6.4
6.5
Main burners go out during hot water use
6.6
6.7
Water is too hot
6.8
6.9
Low hot water pressure
6.10
Noise when heater is running
6.11
Burners do not burn cleanly, yellow
flames when operating
7
8
8.1
Interior components
8.2
8.3
9
2
1
Warning
2
Warning: The heater must be isolated
3
from the gas supply piping system
3
during any pressure testing of that
4
system at test pressures equal to or
4
more than 0.5 psig.
5
6
Caution:
6
modifications not expressly approved
6
by the party responsible for compliance
6
could void the user's authority to
9
operate the equipment.
9
11
13
13
14
14
15
15
15
16
16
17
17
17
17
18
18
Water temperature over 125°F can
18
cause severe burns instantly or
death from scalds.
Children, disabled and elderly are
19
at highest risk of being scalded.
19
See instruction manual before
19
setting temperature at water
heater.
19
Feel water before bathing or
showering.
20
20
21
21
22
22
Fig. 1
22
22
23
24
24
25
26
27
Any
changes
D A N G E R
HOT
BURN
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6 720 644 942
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