Reznor MASA Unit Installation Manual - Manual (Page 2)

Form I-COND, P/N 220746R6, Page 2
Table of Contents
1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Hazard Labels and Notices . . . . . . . . . . . .3
1.2 General Information . . . . . . . . . . . . . . . . . .4
1.3 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.4 Installation Codes . . . . . . . . . . . . . . . . . . . .4
2.0 Location . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.0 Receiving, Moving, and Uncrating . . . . 5
3.1 Receiving . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.2 Moving . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.3 Uncrating . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.3.1 Shipped-Separate Items . . . . . . . . . . .5
4.0 Clearances and Dimensions . . . . . . . . . 5
4.1 Clearances . . . . . . . . . . . . . . . . . . . . . . . . .5
4.2 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . .6
5.0 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.2 Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5.3 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . .7
6.0 Mechanical . . . . . . . . . . . . . . . . . . . . . . . 7
6.1 Refrigerant Piping . . . . . . . . . . . . . . . . . . . .7
6.1.1 Location of Piping Connections at
the Condensing Unit . . . . . . . . . . . . . .7
6.1.2 Location of Piping Connections at
the Split System Evaporator Coil. . . . .8
6.1.3 Refrigerant Piping Guidelines
(R-410A Refrigerant) . . . . . . . . . . . .11
6.1.3.1 Type of Refrigerant Piping . . . . .11
6.1.3.2 Refrigerant Piping Length
and Size . . . . . . . . . . . . . . . . . . . . . .11
6.1.3.3 Liquid Line Piping . . . . . . . . . . . .13
6.1.3.4 Suction Line . . . . . . . . . . . . . . . .15
6.1.3.5 Optional Hot Gas Bypass Lines .15
6.1.3.6 Brazing Connections . . . . . . . . .16
6.1.3.7 Piping Support and Insulation . . .16
6.2 Leak Test the Refrigerant Circuits. . . . . . .16
6.2.1 Leak Test the Condensing Unit . . . .16
6.2.2 Leak Test the Field-Installed Piping. .17
6.3 Evacuate the Circuits . . . . . . . . . . . . . . . .17
6.4 Charge with R-410A Refrigerant . . . . . . .17
7.0 Electrical and Wiring . . . . . . . . . . . . . . 18
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . .18
7.1.1 Wiring Diagram . . . . . . . . . . . . . . . . .18
7.2 Supply Wiring . . . . . . . . . . . . . . . . . . . . . .18
7.2.1 Disconnect Switch. . . . . . . . . . . . . . .18
7.2.2 Supply Voltage . . . . . . . . . . . . . . . . .18
7.3 Unit Wiring Requirements . . . . . . . . . . . .19
7.4 Control Wiring . . . . . . . . . . . . . . . . . . . . . .21
8.0 Controls and Operation . . . . . . . . . . . . 21
8.1 Analog Control System . . . . . . . . . . . . . . .21
8.2 Digital Control System . . . . . . . . . . . . . . .21
8.3 Other Compressor and Refrigerant
Controls . . . . . . . . . . . . . . . . . . . . . . . . .22
8.3.1 High Pressure Cutoff . . . . . . . . . . . . .22
8.3.2 Low Pressure Cutoff . . . . . . . . . . . . .22
8.3.3 Hot Gas Bypass Valve (Option
CUG2 or CUG3) . . . . . . . . . . . . . . . .22
8.3.4 Compressor Protection (CUB1). . . . .22
8.3.5 Crankcase Heaters . . . . . . . . . . . . . .22
9.0 Final Checks and Start-Up. . . . . . . . . . 23
9.1 General Comments . . . . . . . . . . . . . . . . . .23
9.1.1 Checklist Prior to Start-up . . . . . . . . .23
9.2 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . .24
9.2.1 Power Supply Voltage Phasing . . . . .24
9.2.2 Operating Sequence . . . . . . . . . . . . .24
9.2.3 Refrigerant Charge . . . . . . . . . . . . . .25
9.2.3.1 Check SUBCOOLING . . . . . . . .25
9.2.3.2 Determine SUPERHEAT . . . . . . .25
9.2.4 Optional Hot Gas Bypass Valve . . . .26
10.0 Maintenance and Service. . . . . . . . . . 26
10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . .26
10.2 Maintenance Schedule . . . . . . . . . . . . . .27
10.3 Condenser Fan(s) Maintenance . . . . . . .27
10.4 Condenser Coil Maintenance . . . . . . . . .28
10.5 Compressor Maintenance and
Replacement . . . . . . . . . . . . . . . . . . . . .28
10.6 Troubleshooting Chart. . . . . . . . . . . . . . .34
APPENDIX
IMPORTANT Reminders about R-410A
Refrigerant and POE Oil . . . . . . . . . . . .36
Model MASA Technical Information . . . . . . . .36
Electrical Information. . . . . . . . . . . . . . . . . . . .37
Pressure/Temperature Chart for R-410A
Refrigerant for Checking Subcooling
and Superheat . . . . . . . . . . . . . . . . . . . .37
CONDENSER STARTUP FORM . . . . . . . . . .38
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . 39
INSTALLATION RECORD - to be
completed by the installer. . . . . . . . . 40