on the control valve body, and bleed the fuel line and
valve body as described in paragraph 3-33c(6).
(9) Overheat switch (fig. 3-10.2).
(a) Install the overheat switch (24) on the
heater and secure with the two screws (18).
(b) Connect the wires to the terminals on the
top of the switch and secure with the two screws
(10) Electrical inlet assembly installation (fig.
(a) Connect the lead from connector D on the
receptacle to the terminal on the flame detector
switch (21) by installing a screw (20).
(b) If the igniter has been removed, install it
as described in b(6) above.
(c) Install terminal (31) and washers (30 and
32) on the grounding stud on the heater housing.
Connect the electrical inlet assembly ground lead
from connector terminal A to the grounding stud
and secure with nut (29). Install the igniter ground
on terminal (31).
(d) Install the electrical inlet assembly on the
heater housing and secure by tightening the two
(11) Burner assembly installation (fig. 3-10.2).
(a) Position burner assembly (10) so that the
burner assembly flange engages the flange in the
heat exchanger (15); secure with six screws (39).
(b) Position the secondary blower housing (3)
on the heat exchanger assembly (15) so that it fits
snugly against the burner assembly. The neck on
the housing must aline with the hole in the heater
(c) Connect the fuel tube (5) to the fuel
bushing on the burner assembly (10), and to the fuel
control valve outlet elbow.
(d) Install the igniter tube and bracket (8) in
the heater, and check that it seats properly in the
igniter pocket on the burner assembly (10). Secure
the tube to the secondary blower housing (3) with
the screw (4).
(e) Install the igniter (b(6) above.
(12) Blower assembly installation (fig. 3-10.2).
(a) Feed the three leads from the blower
assembly (1) through the hole in the heater housing
(28). Slide the grommet (33) onto the leads and work
the grommet into the hold in the heater housing,
(b) Position the blower assembly on the
heater housing so that the leads are toward the top
of the housing, as shown in figure 3-10.11. Aline the
slotted mounting holes with the tapped holes in the
heater housing and secure the blower assembly by
installing and tightening the four screws (2, fig.
(c) Make all necessary electrical connections.
(d) Install the guard assembly (16, fig. 3-10.2)
and secure by tightening the two fasteners.
c. Deflector Installation. Install the deflector on
the personnel heater as shown in figure 3-9.
d. Air Control Assembly Installation. Install the
air control assembly on the personnel heater as
shown in figure 3-9.
e. Personnel Heater Assembly Installation. Refer
to TM 9-2350-256-20 for instructions on in-
stallation of the personnel heater assembly in the
a. Subassembly Tests. Before conducting tests of
the assembled heaters, the following tests and
calibrations should have been performed during
disassembly for repairs. If they were not performed
at that time, do them before the beater assembly is
(1) Flame detector switch calibration. See
(2) Blower speed test, See paragraph
(3) Voltage limiter test. See paragraph
(4) Fuel control valve flow test and calibration.
See paragraph 3-36 b(1)(h).
b. Test Equipment.
(1) DC power supply manually adjustable from
18 to 30 volts, with a continuous 15-amp capacity.
(2) Two on-off switches.
(3) A normally open (NO) 24-volt relay,
(4) 0 to 20 amp dc ammeter.
(5) 0 to 30 volt dc voltmeter (V1).
(6) 0 to 20 volt dc voltmeter (V2).
(7) 24-volt pilot lamp.
(8) Connector to mate with receptacle on heater.
(9) Filtered supply of No. 2 diesel fuel (Federal
Spec. VV-F-800 Grade II), supplied at 5 ± 1/2 psig.
(10) A pyrometer duct constructed to the
dimensions shown in figure 3-10.14 and fitted with
a thermometer or pyrometer which reads up to