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C A U T I O N
In the case of model 090, both of the pulley grooves
should be at the same distance from the fixed core of
the pulley (same number of open or close turns).
1.
Pulley completely closed (maximum diame‐
ter). Maximum air flow.
2.
Pulley completely open (minimum diameter).
Minimum air flow.
DP
Pulley diameter
Gas pressure regulation in the burner
supply manifold
The units are manufactured and regulated for the
2ND-H (G-20) natural gas family .
Gas is regulated depending on the type of gas used,
follow the steps below and adjust the two valves ac‐
cording the values specified in
Pulley adjustment
(models 045/060/075: 1 groove; models 090: 2
grooves)
, see on page 31 .
C A U T I O N
The gas valve in units converted to LPG (Liquid Pe‐
troleum Gas, propane) should be regulated according
to the technical instructions included in the conversion
kit.
1. Tasks to do first:
– Regulation of the inside pilot -Pe-. The regulator
screw is under the plastic cap. Starting at the “com‐
pletely closed (-)” position, make -V1- five complete
anti-clockwise turns using a flat tipped screw driver
– Regulating using quick partial opening -Vstart-. The
regulator screw is under the plastic cap. Starting at
the “completely closed (-)” position, make -Vstart- one
turn in anti-clockwise direction using the the cap itself
C A U T I O N
• Do not use a screwdriver to make a quick partial
opening regulation. -Vstart-.
• Never move the screw resealed in red.
1
Installation manual
1.16 Instructions for starting up the unit
32
Summary of Contents for ARC 045
Page 1: ...ACTIVA SERIES ROOF TOP Air Conditioners Installation manual Ref N 40XXX...
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Page 5: ...1 Installation manual...
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Page 47: ...2 Unit installation data...
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