GAS-FIRED
UNIT HEATERS
Hastings gas-fired unit heaters are suspended,
self-contained and completely automatic heating devices used for space heating. These
units are the ideal heating system for a variety of commercial and industrial
applications. They can be applied almost anywhere that space heating is required.
Fan models are normally used for space and spot heating.
Standard Equipment
All Models -
Cabinet :
Side panels of 20 gauge cold rolled steel., 20 gauge
aluminized steel drain pans on all models except GF-400 which is constructed of 18 gauge.
Side panels and drain pans are finished with enamel.
Adjustable two point hangers on F-50 and GF-100 thru 300.
Fixed four point hangers on GF-400
Draft Hood :
22 gauge aluminized steel.
Heating Section :
Choice of three all electric-welded heat exchange:
- Aluminized steel, 18 gauge tubes and 16gauga header plates.
Internal baffles are aluminized steel with stainless steel tips.
- Type 409 stainless steel .044" tubes and .050"
header plates. Internal baffles are .032" Type409 stainless steel with stainless
steel tips.
- Types 321 stainless steel, .041" tubes and .050"
header plates. Internal baffles are .032" Type 409 stainless steel with stainless
steel tips.
Burners are 18 gauge aluminized steel with Type 430
stainless steel ribbon inserts to provide automatic proportioning of primary combustion
air.
Gas and Electrical Components :
24 volt combination gas valve consisting of main and pilot
gas cocks, main and pilot gas pressure regulators, redundant solenoid gas valves, pilot
solenoid gas valve and 100% safety shutoff; also high limit control, fan control and
115/24 volt control transformer.
Motor(s) :
All motors are cushion mounted, have overload protection
and are totally enclosed, except for F-50 which has open ventilated motor mounted inside
of cabinet.
Gas System :
For inlet gas pressure of 6" sto 14" w.c. natural
gas, or 11" w.c. propane.
Horizontal louvers:
Allows for 2-way air distribution.
Options and Accessories
All models -
Electronic Ignition systems :
- Intermittent pilot with non-100% shut off - When room
thermostat calls for heat, pilot valve opens and pilot is spark ignited. Then when
pilot is proven,ll main gas valve opens. When room thermostat is satisfied, main gas valve
and pilot valve are de-energized.
- Intermittent pilot with 100% shut-off - Same as non 100%
shut-off except the system will lockout and require manual starting if the pilot fails to
ignite in a given time period. Electronic ignition with propane must be 100% shut-off.
Room thermostats - Several
models of 24 volt thermostats available.
Fan time delay relay - Used
to prevent system fan from short cycling in rooms 50 F. Standard control on GF-400 fan
model.
Two-stage valve -
Provides both 100% and 50% gas input to yield two firing rates. Two stage thermostat is a
required extra. Electric ignition required. (not available for F-50)
Summer fan switch -
For continuous fan operation.
230and 460 volt power - Replaces
115 volt power.
High fuel pressure regulators
(field installed ):
- 1/2 to 5 lb. line pressure (specify pressure).
- Over 5 lb. line pressure (specify pressure).
Power venters - Are
generally required where:
- IRI approved controls specified.
- Negative pressure exists inside the building.
- Flue pipes have downward or long horizontal runs.
- Heaters are vented directly through a side wall with no
vertical stack.
- Heat exchangers or stacks are extremely cold and will not
provide adequate draft on start-up.
Power venters and companion adapters are shipped for field
installation and wiring.
Dual-Fuel manifold - Natural/LP
gas kit includes dual-fuel manifold, spuds and LP gas controls. Pilot remains on
natural gas. Available only for field installation.
Note : Dual-fuel manifold and power venters are not A.G.A.
design certified.
Vertical louvers - Offers 4-way air distribution, Standard equipment on F-50 fan model. |
