Install Instructions

Dimensions
5.33
135
4.20
107
4.72
120
NEMA 3R Enclosure
4.12
105
3.34
85
0.875
22.23
Diameter
Conduit Hole
(2 places)
Two 22 AWG Wire
Leads for 24 VAC
Power Supply
(NEMA 3R
Enclosure)
1.28
33
6.75
172
6.00
152
5.26
134
3.38
86
4.56
116
0.27
7
Diameter Mounting Holes
for No. 10 Screw
0.218
5.54
Two 0.250 Spade Terminals
for 24 VAC Power Supply
Inside Plug (NEMA 1 Enclosure)
Valve
Depressor
1/4 in. Flare
7/16 in.
20 UNF-2B
0.093
2.36
Diameter
Capillary
P66_DIMS_ENCLOSURE
Figure 1: P66 Control and NEMA 3R Enclosure Dimensions, in./mm
Mounting
Observe the following guidelines when mounting a
P66 control and routing the control’s capillary tube:
!
CAUTION: Risk of Environmental and
Property Damage
Coil and secure excess capillary tubing away from
contact with sharp or abrasive objects or surfaces.
Vibration or sharp or abrasive objects in contact with
capillary tubes can cause damage that may result in
refrigerant leaks or loss of element charge which
may result in damage to the environment or
property.
!
CAUTION: Risk of Environmental and
Property Damage
Avoid sharp bends in the capillary tubes. Sharp
bends can weaken or kink capillary tubes which may
result in refrigerant leaks or restrictions of flow.
• Maintain operating pressures and temperatures
within the listed product ratings to assure reliable
operation. See Technical Specifications table.
• Mount the P66 control away from sources of
excessive heat.
• Mount the P66 control with the cooling fins in a
vertical position with no obstruction preventing
airflow through the fins.
• Locate the P66 control where fan air passes
through the cooling fins to maximize heat
dissipation.
• Locate the P66 control so the pressure elements
inside the base are above the refrigerant liquid
level of the controlled equipment.
• Mount the control where it can be conveniently
wired to the power supply and the motor.
• Provide the recommended pressure connection in
the high-pressure vapor line near the condenser
inlet. (A 60 in. capillary is standard.)
2 P66 Series Electronic Fan Speed Controls Installation Instructions