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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.
Do not attempt to install a "Fan Only" switch on a
8.
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.
Page 2 of 16
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.
ENM-2119-01 / HX-23-2199-83-3
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