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Installation and maintenance personnel should familiarize themselves with this manual and all the WARNINGS before installing or
working on this heater to avoid potential hazardous conditions, severe property damage, personal injury or death.
1. To reduce the risk of ignition of hazardous atmospheres:
Do not install where the operating temperature code limit
exceeds the ignition temperature of the hazardous
atmosphere.
2. Potentially lethal voltages are present. Be sure to lock the
branch circuit disconnect switch in the OFF position and
tag the circuit "Out for Maintenance" before working on
this equipment.
3. Keep electrical enclosure covers tightly closed while in
operation.
4. Hazard of Electric Shock. Heater must be grounded in
accordance with the N.E.C. and/or C.E.C.
5. This heater should be installed by qualified personnel
familiar with the National Electric Code and/or the
Canadian Electrical Code requirements for hazardous
locations. It is the responsibility of the installer to verify
the safety and suitability of the installation.
6. Disassembly of the unit, for installation, is not required or
authorized.
7. When connecting the room thermostat, be sure that the
thermal cutouts remain connected in series with the
controlling contactor. The unit must not operate without
the thermal cutouts properly connected in the circuit.
8. Do not attempt to install a "Fan Only" switch on a
standard unit heater and do not try to field modify a
standard unit heater for this option. The heater must have
been ordered for this option to have the necessary internal
controls.
9. Replacement of electrical components should only be
done by qualified personnel familiar with the
requirements of maintaining electrical equipment in
hazardous locations.
10. Replacement electrical components must be obtained
from the factory in order to maintain the hazardous
location rating.
WARRANTY WILL BE VOID IF INSTRUCTIONS ARE NOT FOLLOWED.
WARNINGS
11. The heat exchanger is a factory vacuum-sealed unit. Do
not attempt to loosen or tighten any of the fill or drain
plugs or attempt to operate the pressure relief valve. A
loss of vacuum could cause nuisance tripping of the
cutouts or high pressures which will cause the relief valve
to actuate with an accompanying loss of liquid. Should
leakage occur, remove unit from service and investigate
cause.
12. The heat exchanger is filled with a mixture of water and
inhibited propylene glycol. Contact with the fluid at
operating temperatures may produce a burn hazard. The
Material Safety Data sheets indicate that there is not a
health hazard from coming in contact with the inhibited
propylene glycol. Suggested first aid consists of flushing
eyes with plenty of water and to wash off skin in flowing
water or a shower.
13. Install and operate in an upright position only. Failure to
comply will cause the overtemperature thermal cutouts to
trip.
14. Installation minimum mounting clearances on nameplate
must be maintained.
15. Use copper wire for supply connections according to size
and rating on nameplate.
16. Do not attempt to override louver stops or operate unit
with louvers fully closed.
17. "Warning Light", if supplied, will turn on if the high
temperature thermal cutout opens. This could result if the
heat exchanger is dirty, inlet air is obstructed, vacuum
loss in heat exchanger, fan not turning or incorrect supply
voltage. Disconnect power to unit before servicing.
18. Crackling noises within the heat exchanger at startup are
normal.
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