11
Models C708/C709/C716/C717
Introduction
Running Specifications
Pressures/Temperatures
The following are the Taylor Company
recommended settings for various components
within these models. The freezers in this manual use
refrigerant R404A.
Note: These settings apply to both sides of the
C716 and C717.
EPR Valve = 60 psi (414 kPa)
DBV Valve = 10 - 11 psi (69 - 76 kPa)
OPR Valve = 40 psi (276 kPa)
Expansion Valve (AXV)
Air Cooled - 21 psi (145 kPa)
Water Cooled - 21 psi (145 kPa)
for a normal product of 16° to 18°F (-8.8° to -7.7°C).
Expansion Valve Adjustment (AXV)
Place your gauge on the access valve on the suction
line (located at the compressor).
Adjust higher or lower by turning the adjustment
screw. Clockwise turns raise the pressure and
counterclockwise lower the pressure.
Note: Make expansion valve adjustments with mix
in the cylinder and the freezer in the AUTO mode.
Be sure to allow adequate time for the pressure to
stabilize.
Low Side (Suction)
Suction pressure equals expansion valve setting.
High Side (Discharge)
High side pressure varies for air cooled units,
depending on the ambient temperature.
Ambient Temperature Normal Operating Head
Pressures
F C PSI
70° 21.1° 240 - 270
(1,655 - 1,862 kPa)
80° 26.7° 270 - 300
(1,862 - 2,069 kPa)
90° 32.2° 300 - 340
(2,069 - 2,344 kPa)
100° 37.8° 340 - 380
(2,344 - 2,620 kPa)
Water Valve
On a water cooled unit, the water valve should be
set to maintain a compressor head pressure of 255
PSI (1,758 kPa).
Water Valve Adjustment
Place your gauge on the high side access port of the
compressor. Turning the adjustment stem on the
water valve clockwise will lower the pressure.
Note: Make this adjustment with mix in the cylinder
and the freezer in the AUTO mode. Be sure to allow
adequate time for pressure to stabilize.
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