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The temperature of the water in the heater can be reg-
ulated by adjusting the setpoint, this process is fully
described in the manual in the "Controls" section (see
page 47).
For accurate control of water temperature, the sensors
must be properly installed according with the piping
configuration, see "Applications & Modes" section for
detailed information (see page 19).
CAUTION: Hotter water increases the risk of scald-
ing! There is a hot water scald potential if the
thermostat is set too high.
Temperature & Pressure Gauge
The temperature and pressure gauge is factory-
mounted in the in/out header.
INSTALLATION
Installation Codes
Installations must follow these codes:
•
Local, state, provincial, and national codes, laws,
regulations and ordinances
•
National Fuel Gas Code, ANSI Z223.1/NFPA 54 –
latest edition (NFGC)
•
National Electrical Code, ANSI/NFPA 70 - latest
edition (NEC)
•
Standard for Controls and Safety Devices for
Automatically Fired Boilers, ANSI/ASME CSD-1,
when required (CSD-1)
•
For Canada only: CAN/CSA B149 Installation
Code (B149) and CSA C22.1 C.E.C. Part 1
(C22.1)
Equipment Base
The heater should be mounted on a level, structurally
sound surface. The heater is approved for installation
on a combustible surface but must NEVER be
installed on carpeting. Gas-fueled equipment installed
in enclosed parking garages must be located at least
18 in. above the floor.
Stacking
Hi Delta units can be stacked two units high with an
optional stacking rack. A stacking kit (sales order
option X-1) is available from Raypak for this type of
installation. For installations above grade, a reinforc-
ing kit (sales order option X-2) may also be required.
CAUTION: The heaters should be located in an
area where water leakage will not result in damage
to the area adjacent to the appliances or to the
structure. When such locations cannot be avoided, it
is recommended that a suitable catch pan,
adequately drained, be installed under the
appliance. The pan must not restrict air flow.
Fig. 4: Typical Stacked Installation
9
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