Converting Horizontal Discharge Units To Downflow (Vertical) Discharge; Provide For Condensate Disposal - Payne PA3Z Installation Manual

UNIT ELECTRICAL CHARACTERISTICS
PA3Z024 208/230-1-60
PA3Z030 208/230-1-60
PA3Z036 208/230-1-60
PA3Z042 208/230-1-60
PA3Z048 208/230-1-60
PA3Z060 208/230-1-60
• Size ductwork for cooling air quantity (cfm). The minimum air quantity for proper electric heater operation is listed in Table 3. Heater limit
switches may trip at air quantities below those recommended.
• Insulate and weatherproof all external ductwork. Insulate and cover with a vapor barrier all ductwork passing through conditioned spaces.
Follow latest Sheet Metal and Air Conditioning Contractors National Association (SMACNA) and Air Conditioning Contractors Association
(ACCA) minimum installation standards for residential heating and air conditioning systems.
• Secure all ducts to building structure. Flash, weatherproof, and vibration-isolate duct openings in wall or roof according to good construction
practices.
Fig. 4 shows a typical duct system with PA3Z unit installed.
A. CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE
WARNING: ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before performing service or maintenance operations on system, turn off main power to unit and install lockout tag. Turn off
accessory heater power switch if applicable.
Units are dedicated side supply products. They are not convertible to vertical air supply. A field-supplied plenum must be used to convert to vertical
air discharge.
PROCEDURE 6—PROVIDE FOR CONDENSATE DISPOSAL
NOTE: Be sure that condensate-water disposal methods comply with local codes, restrictions, and practices.
Unit removes condensate through a 1 3/64-in. ID hole (using 3/4-in. OD piping or tubing) which is located at the end of the unit. See Fig. 2 for
location of condensate connection.
Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground-level
installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure that the outlet of the
trap is at least 1 in. lower than the drain-pan condensate connection to prevent the pan from overflowing. Prime the trap with water. When using
a gravel apron, make sure it slopes away from the unit.
If the installation requires draining the condensate water away from the unit, install a 2-in. trap using a 3/4-in. OD tubing or pipe. (See Fig. 5 and
6.) Make sure that the outlet of the trap is at least 1 in. lower than the unit drain-pan condensate connection to prevent the pan from overflowing.
Prime the trap with water. Connect a drain tube using a minimum of 3/4-in. PVC, 3/4-in. CPVC, or 3/4-in. copper pipe (all field supplied). Do
not undersize the tube. Pitch the drain tube downward at a slope of at least 1 in. for every 10 ft of horizontal run. Be sure to check the drain tube
for leaks. Prime trap at the beginning of the cooling season start-up. Allowable glues for condensate trap connection are: Standard ABS, CPVC,
or PVC cement.
Table 1—Unit Specifications
UNIT WEIGHT
lb kg
268 122
299 136
352 160
364 165
359 163
408 185
19.17 3.92
Fig. 3—Area Not to Be Drilled More Than 3/4-in.
—5—
UNIT HEIGHT
CENTER OF GRAVITY IN. (MM)
IN. (MM)
"A"
X
30.13 (765) 14.0 (356)
34.13 (867) 14.0 (356)
42.13 (1070) 14.0 (356)
42.13 (1070) 14.0 (356)
42.13 (1070) 14.0 (356)
42.13 (1070) 14.0 (356)
A05195
Y Z
19.0 (483) 12.0 (305)
19.0 (483) 12.0 (305)
19.0 (438) 19.8 (503)
19.0 (483) 21.9 (556)
19.0 (483) 19.8 (503)
19.0 (483) 21.9 (556)