09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
11-12
20.
Locate the Control Cable and Fan switch in the instrument panel. Keep this in
mind when planning your instrument panel layout.
21.
Locate a hole in the Firewall and route the Control Cable to the Control Valve.
Trim the control wire after connecting, leaving 2" for adjustments. Check the
control wire and housing for a secure installation. Any movement of the housing
will reduce the travel stroke. If the valve cannot fully open and close,
performance of the heater will be diminished.
22.
Drill #40 the center of the Valve control arm post. After retaining the Control
Cable housing in the clamp on the Valve, bend the wire to retain it to the valve
post. It must be bent in a tight loop around the post. The easiest way is to start to
wrap it around, bend it into a hook shape. Slip it off the post and use a pair of
pliers to hold it while completing the loop with needle-nose pliers. Twist it tight so
it fits snug over the post. Secure with #6 Pan Head Screw, stainless steel washer
and small brass washer.
23.
With the heater mounted, slip the heater hoses onto the nipples of the core and
tighten all the hose clamps. Check all hose and fittings for security and chafing.
24.
Connect wires to fan. Route them to the switch and power source.
25.
To keep the hoses out of the rudder pedals, use a 1" cushioned clamp bolted to
the firewall. Test operate the pedals to assure tangle free movement. After the
hoses are clamped to the firewall, install the Hose Covers. The cover of the hose
that is clamped to the firewall will need to be cut with a hot knife to fit around the
clamp, or remove the cushion off the clamp to allow clearance. Tie the hoses
together with Plastic Ties.
IMPORTANT:
Double check to be sure there is no interference with
Rudder Pedals.
26.
After final engine install, check for coolant leaks and proper operation during
engine test run.
27.
The heater should produce noticeable heat within a few minutes of starting the
engine. Depending on how well your cabin is sealed, and the outside air
temperature, the heater should be able to keep the cabin warm enough for
extended flying on winter days, or at altitude. Do not expect the heater to keep up
if you have many air leaks in your cabin, or if it is extremely cold (below 20
degrees F.).
