Table 1—Unit Specifications
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| UNIT WEIGHT | UNIT HEIGHT | CENTER OF GRAVITY IN. (MM) | ||||
UNIT | ELECTRICAL CHARACTERISTICS | IN. (MM) | ||||||
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| lb | kg | ″A″ | X | Y | Z | |
50ZHA024 | 293 | 133 | 30.13 (765) | 14.0 (356) | 19.0 (483) | 12.0 (305) | ||
50ZHA030 | 324 | 147 | 34.13 (867) | 14.0 (356) | 19.0 (483) | 12.0 (305) | ||
50ZHA036 | 377 | 171 | 42.13 (1070) | 14.0 (356) | 19.0 (438) | 19.8 (503) | ||
50ZHA042 | 389 | 177 | 42.13 (1070) | 14.0 (356) | 19.0 (483) | 21.9 (556) | ||
50ZHA048 | 384 | 175 | 42.13 (1070) | 14.0 (356) | 19.0 (483) | 19.8 (503) | ||
50ZHA060 | 433 | 197 | 42.13 (1070) | 14.0 (356) | 19.0 (483) | 21.9 (556) |
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When designing and installing ductwork, consider the following:
UNIT DAMAGE HAZARD
Failure to follw this caution may result in damage to unit components. When connecting ductwork to units, do not drill deeper than 3/4 inch in shaded area shown in Fig. 3 or coil may be damaged.
•All units should have
•Avoid abrupt duct size increases and reductions. Abrupt change in duct size adversely affects air performance.
IMPORTANT: Use flexible connectors between ductwork and unit to prevent transmission of vibration. Use suitable gaskets to ensure weathertight and airtight seal. When electric heat is installed, use fire proof canvas (or similar heat resistant material) connector between ductwork and unit discharge connection. If flexible duct is used, insert a sheet metal sleeve inside duct. Heat resistant duct connector (or sheet metal sleeve) must extend
•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 Condi- tioning Contractors National Association (SMACNA) and Air Conditioning Contractors Association (ACCA) minimum in- stallation standards for residential heating and air conditioning systems.
•Secure all ducts to building structure. Flash, weatherproof, and
Figure 4 shows a typical duct system with 50ZHA unit installed.
CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE
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
Step 6—Provide for Condensate Disposal
NOTE: Be sure that
Unit removes condensate through a 1
19.173.92
A05195
Fig. 3—Area Not to Be Drilled More Than 3/4-in.
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
If the installation requires draining the condensate water away from the unit, install a
4