TM 5-4520-256-14
g. Power Connection. (Refer to Figure 2-7).
(1) Be sure the OFF/VENT/HEAT selector switch 51 (3) is set to OFF position and toggle switch 57 (2) is not in the
ON position.
CAUTION
When the heater unit is used in a Bare Base application, refer to the applicable Bare Base
Electrical System technical manual or coordinate electrical installation requirements with
electrical power management authority before proceeding to step (2). Failure to comply may
result in damage to the secondary distribution center (SDC).
(2) Connect heater power cable (1) to a 120 (+/- 10) volt, 50/60 Hz, single-phase, 20/25 ampere circuit breaker or
fused power source.
NOTE
Army heater model H83 (only) will start reliably from a 3 Kw generator down to -15 °F (-26 °C).
Below -15 °F, a larger generator is required to start the heater.
Figure 2-7. Electrical Connection.
NOTE
(Army Only)
S/N's to H820549 1: Power plug fits 15 ampere duplex receptacle; does not fit Distribution
Illumination System, Electrical (DISE) outlets. If circuit breaker keeps tripping or plug keeps
falling out of DISE outlet, have a qualified electrician replace originally installed plug with the
DISE-compatible plug listed in Appendix D. Retain original plug for turn-in with heater.
S/N's after H8205491: Power plug fits 20 ampere outlet in DISE M40 distribution center. If plug
won't fit your power outlets, have a qualified electrician replace originally installed power plug
and outlet with plug and receptacle listed in Appendix D for use with non-DlSE, 20 ampere circuit
and 5/8 in. power cable. Retain original plug and outlet for turn-in with heater and power
source.
Change 3 2-17
