GENERAL
The complete shipment should be inspected for damage. Any damage visible at the time of delivery should be noted on
the shipment invoice.
These units are shipped completely assembled and wired. Units require interconnecting piping (AHU), external power,
thermostat wiring, condensate drain piping and ducting as applicable.
Size of unit for an installation should be based on a heat load calculation made according to applicable standards. Units
must also be installed in accordance with regulations of the "National Fire Protection Association" and local electrical
codes. Where local regulations vary with instruction furnished, installer should adhere to local standards.
Prepare your concrete pad or steel stand as applicable. Remove shipping protective covers and wooden crating and lift
unit from base and place in position with necessary applicable vibration isolators.
Compressors are already charged with the required amount of lubricant. There is no need to charge in the field. Make
sure that no air & moisture enter the system as easter oil are hygroscopic in nature.
Equipment must be installed so as to allow for service access and air circulation in accordance with these instructions
and other Zamil publications for the specific equipment being installed.
These units are charged with ozone friendly R-134a refrigerant.
LOCATION OF UNIT
When selecting the location for the unit, the following points should be kept in mind:
1. Provisions for a concrete slab which will allow for minimum clearance from building or structures
2. That the terrain allows for drainage away from the unit.
3. If the unit is to be roof mounted, inspect the roof for load bearing capacity. The roof should have sufficient structural
strength to carry the weight of the unit.
4. Availability of electric power.
5. Position the unit to provide for unrestricted air circulation and to prevent any possibility of air recirculation.
6. Check minimum clearances required for your unit, with regard to walls, or other obstructions.
7. Air cooled equipment should not be installed under low structural overhangs which can cause condenser air recircu-
lation or restriction.
8. Care should be taken to prevent air from other sources from entering condenser, if this air is at a high temperature.
REFRIGERANT PIPING CONNECTIONS
Piping connections:
Outdoor units should be connected to indoor units using field-supplied piping of refrigerant grade and correct size. The
liquid and suction line diameters can be determined from the physical data table.
Outdoor unit connected to matching Zamil indoor unit:
Outdoor unit contain adequate system refrigerant charge for operating with matched indoor unit (as per corresponding
cooling capacity table) and when connected with up to 25 feet (7.62 m) of field-supplied piping.
Sweat connection:
Units are provided with service valves and are ready for brazing. After wrapping the service valve with a wet cloth, the
piping set can be brazed to service valve using either silver rod or silfos rod brazing materials.
LEAK TESTING & REFRIGERANT CHARGING
Leak test:
Leak can occur from joints or fittings that are improperly brazed/connected during installation of indoor and outdoor units.
The installer should leak test the indoor unit & associated field supplied refrigerant piping, then the outdoor unit, each
separately using electronic freon detector and/or soap bubbles.
Refrigerant Charging:
(To be used for system having a holding charge and to compensate for length of liquid line).
1. When system wired, piped and evacuated, the unit is ready for refrigerant charging. All charging lines and manifolds
must be purged with refrigerant vapor prior to admitting refrigerant into the system to prevent contamination system
with non-condensable.
INSTALLATION INSTRUCTIONS
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