Carrier 50TJ016-028 specifications Motormaster I Control Installation 50TJ016 and 020 Only

VENTILATION AIR (Minimum Position Set Up) — If ven- tilation air is not required, skip this section. If ventilation air is required, perform the following:

1.The indoor fan must be on to set the ventilation air. Either put the thermostat in the continuous fan mode or jumper the R and G terminals at the rooftop unit con- nection board.

2.Locate the minimum position (MIN POS) potentiometer. Turn the potentiometer full CCW to fully close the out- door air dampers. Turn the potentiometer gradually clockwise (CW) to the desired position. See Fig. 16.

3.Replace the filter access panel. See Fig. 18. Ensure the fil- ter access panel is securely engaged.

4.Calculate the minimum airflow across the EconoMi$er.

a.Calculate % of outside air using the following formula.

% Outdoor air through EconoMi$er

Personal Injury Hazard. Avoid possible injury by keep- ing fingers away from damper blades.

Step 9 — Install All Accessories — After all the factory-installed options have been adjusted, install all field- installed accessories. Refer to the accessory installation instruc- tions included with each accessory.

MOTORMASTER® I CONTROL INSTALLATION (50TJ016 and 020 Only)

Install Field-Fabricated Wind Baffles — Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low ambient temperatures. See Fig. 25 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-supplied screws to attach baffles to unit. Screws should be 1/4-in. diameter and 5/8-in. long. Drill required screw holes for mounting baffles.

% Outdoor air =

Mixture Temp – Return Air Temp

Outdoor Temp – Return Air Temp

b. Multiply total CFM by percentage outdoor air, this gives outdoor air volume in CFM.

To avoid damage to the refrigerant coils and electrical com- ponents, use recommended screw sizes only. Use care when drilling holes.

Unoccupied Control (Part number on the control

must be AD-DME1701-1 or AD-DME1711-1.)

Outdoor Air Enthalpy
CROUTENT001A00		Unoccupied
		Contact	470 ohm
			5 watt
	T	Violet	Resistor
C
	O
O	U
M	T T
	PW

	Tan
OAT	Violet
COM	W hite

24 VAC must be present on BI for the system to be unoccupied.

OAH	Red
+15V	Tan
RAT
	Violet
COM
RAH	W hite
+15V	Red
CO 2(+)
CO 2
COM
DAT
COM
REM
POT
COM
LED
COM

Violet

C TO

O U

M T T

PW

Remote

Minimum Position

1k ohm Potentiometer

20 mA LED

Remote

LED

Field-supplied W iring

Return Air Enthalpy

CRRETENT001A00

CO2 Sensors:

33ZCSENCO2

		2 to 10 VDC at
		0 to 2000 ppm
NOT 2 USED	VAC24 VA20	Line
		Voltage
1
-

W iring Included

Fig. 24 — Typical EconoMi$er Sensor Wiring

15