Disassembly

NOTICE

—Replacement of the refrigeration cycle.

1.When replacing the refrigeration cycle, be sure to Discharge the refrigerant system using a FreonTM recovery System.

If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the FreonTM. Leave the valve in place after servicing the system.

2.After discharging the unit completely, remove the desired component, and unbraze the pinch-off tubes.

3.Braze service valves into the pinch-off tube ports, leaving the valves open.

4.Braze the pinch-off tubes with Service valves.

5.Evacuate as follows.

1)Connect the vacuum pump, as illustrated figure 33A.

2)Start the vacuum pump, slowly open manifold valves A and B with two full turns counterclockwise and leave the valves open.

The vacuum pump is now pulling through valves A and B up to valve C by means of the manifold and entire system.

CAUTION: If high vacuum equip- ment is used, just crack valves A

and B for a few minutes, then open slowly with the two full turns counterclockwise. This will keep oil from foaming and being drawn into the vacuum pump.

3)Operate the vacuum pump vaccum for 20 to 30 minutes, until 600 microns of vaccum is obtained. Close valves A and B, and observe vacuum gauge for a few minutes. A rise in pressure would indi- cate a possible leak or moisture remaining in the system. With valves A and B closed, stop the vac- uum pump.

4)Remove the hose from the vacuum pump and place it on the charging cylinder. See figure 33B. Open valve C.

Discharge the line at the manifold connection.

5)The system is now ready for final charging.

6. Recharge as follows :

1)Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put

in the High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened.

2)Connect the charging cylinder as shown in figure 33B.

With valve C open, discharge the hose at the mani- fold connection.

3)Open valve A and allow the proper charge to enter the system. Valve B is still closed.

4)If more charge is required, the high-side will not take it. Close valve A.

5)With the unit running, open valve B and add the balance of the charge.

a.Do not add the liquid refrigerant to the Low- side.

b.Watch the Low-side gauge; allow pressure to rise to 30 lbs (0.2Mp).

c.Turn off valve B and allow pressure to drop.

d.Repeat steps b. and c. until the balance of the charge is in the system.

6)When satisfied the unit is operating correctly, use the pinch-off tool with the unit still running and clamp on to the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos brazing rod and braze pinch-off tube closed. Turn off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection.

Service Manual 20

RAD-183A, RAD-243A specifications

The Heat Controller RAD-183A and RAD-243A are advanced heating solutions designed for optimal climate control and energy efficiency. These models cater to both residential and commercial spaces, providing reliable heating with user-friendly features and innovative technologies.

One of the standout features of the RAD series is its exceptional heating capacity. The RAD-183A has the capability to heat spaces up to 1,800 square feet, making it ideal for medium-sized rooms, while the RAD-243A can effectively service larger areas, catering to spaces of up to 2,400 square feet. This capacity ensures that users can maintain a comfortable environment regardless of external weather conditions.

Both models are equipped with smart heating technology that adjusts the output based on the room's temperature. The thermostat embedded in the RAD-183A and RAD-243A allows for precise temperature control, ensuring that the desired warmth is maintained without unnecessary energy consumption. This means users can rely on their heating system to provide a cozy atmosphere while saving on energy bills.

Energy efficiency is at the forefront of the design for both models. They are engineered to comply with rigorous energy consumption regulations, helping to reduce carbon footprints and lower operating costs. Their high efficiency ratings reflect their capability to deliver maximum heat output while utilizing minimal electricity. This makes them an environmentally friendly choice for conscientious consumers.

Another key characteristic of the RAD-183A and RAD-243A is their user-friendly interface. Both units feature easy-to-read displays and intuitive controls, allowing users to adjust settings effortlessly. With programmable features, homeowners can set schedules to align with their daily routines, further optimizing energy use while ensuring comfort.

Safety is also a paramount consideration in the design of these models. Equipped with multiple safety features, including overheat protection and tip-over switches, users can have peace of mind knowing that their heater operates safely and reliably.

In summary, the Heat Controller RAD-183A and RAD-243A stand out in the market due to their efficient heating capabilities, smart technology, energy efficiency, and user-centric design. With these models, individuals can experience warmth and comfort in their spaces while being mindful of energy consumption and safety.