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a. Remove the dipstick from the engine and check the
engine oil level. Maintain engine oil level between the
“Full” and “Add” marks on the dipstick. Add as need-
ed. See “Engine Oil” in the Maintenance section.
b. Check the engine coolant recovery bottle. Keep
engine coolant in the recovery bottle between 1/3 and
2/3 full. Remove the radiator cap and check the cool-
ant level. Add as needed. See ‘Engine Coolant’ in
Maintenance section.
WARNING
Rapid release of hot coolant under pressure could result in
death or serious injury. Use extreme caution when open-
ing the radiator cap, and always wear eye protection and
heat resistant gloves.
c. Open the cover of the electrical box on the left side of
the engine compartment. Make sure that both heater
unit circuit breakers are in the ON position. Close and
latch the electrical box cover.
4. Check the fuel level in the fuel tank(s) and add as need-
ed.
a. Open the rear engine cover door and secure with the
door cover holders.
b. For heater trailers equipped with a single wall single
fuel tank, check the mechanical fuel gauge built into
the back wall of the fuel tank on the lower left.
c. For heater trailers equipped with either a double-wall
single fuel tank or three individual fuel tanks, turn the
ignition key to the RUN position. Check the level in
the fuel tank(s) with the fuel gauge mounted on the
engine control panel. The engine control panel is at
the lower left of the engine compartment opening.
5. Check to make sure the heater unit fuel shut-off valves
are open. Open the right side heating unit control access
door, and locate the fuel shut-off valves at the bottom of
the opening. To open the valve (allow fuel flow), move
the handle in-line with the fuel valve body. To close the
valve (shut off fuel flow) move the handle perpendicular
to the fuel valve body.
6. Open the left side heater unit outlet access door.
Determine what size ducting is required and install the
appropriate flexible ducting on the heater outlets. See
Installing The Flexible Ducting for installation instructions.
Installing The Flexible Ducting
The heater trailer can be equipped with different size heater
unit outlets. The options for each heater unit include:
• Double 12 inch (305 mm) diameter outlets.
• Single 16 inch (406 mm) diameter outlet.
• Single 20 inch (408 mm) diameter outlet.
Flexible ducting of the same size is available from Allmand.
All sizes of outlets can accommodate both the adjustable
strap and clamp style and slip-lock style flexible ducting.
To use adjustable strap and clamp style ducting:
1. Install the cuff of the flexible ducting with strap and clamp
(A, Figure 17) over the heater unit outlet ring. Make sure
that the cuff, strap and clamp are beyond the bead on the
outlet ring (B).
2. Tighten the cuff over the outlet ring by pulling on the
loose end of the strap (C).
3. To remove the flexible ducting, loosen the clamp and pull
the cuff of the flexible ducting from the outlet ring.
Connecting rings for the slip-lock style of flexible ducting are
available from Allmand. A connecting band must be used to
slip inside the heater unit outlet ring. The connecting band
has three lock pins which engage in the “J” slots of the outlet
ring.
Figure 17
B
A
C
To use the slip-lock style flexible ducting:
1. Install the flexible ducting (A, Figure 18) over the con-
necting band (B). The flexible ducting should cover only
half of the connecting band (inset), allowing the lock pins
and arrows to be visible on the remaining half. Secure
using a large screw type band clamp (C).
2. To attach the slip-lock flexible duct, align a lock pin and
arrow of the connecting band (B, Figure 19) with a “J” slot
in the outlet ring (D). Slip the connecting band inside
the outlet ring as deep as it will go. Twist the connecting
band counter-clockwise to the end of the “J” slot, then
pull back to lock.
3. To remove the slip-lock flexible duct, push the connecting
band in and twist clockwise to the end of the “J” slot, then
pull the connecting band off the outlet ring.
Not
for
Reproduction
