Table of Contents
Advertisement
CONTENTS
13 - NOMINAL SYSTEM WATER FLOW CONTROL ....................................................................................................................... 38
13.1 - Units without hydraulic module.............................................................................................................................................. 38
13.2 - Units with hydraulic module and fixed-speed pump ............................................................................................................. 38
13.3 - Units with hydraulic module and variable-speed pump - pressure differential control .......................................................... 39
13.4 - Units with hydraulic module and variable-speed pump - temperature difference control ...................................................... 39
13.5 - Plate heat exchanger pressure drop (including internal piping) - units without hydraulic module ......................................... 40
13.6 - Pump pressure/flow rate curve - units with hydronic module (fixed-speed or variable-speed pump, 50 Hz) ........................ 40
13.7 - Available external static pressure - units with hydraulic module (fixed-speed or variable-speed pump, 50 Hz) ................... 41
14 - START-UP .................................................................................................................................................................................. 42
14.1 - Preliminary checks ................................................................................................................................................................ 42
14.2 - Actual start-up ....................................................................................................................................................................... 42
14.3 - Operation of two units in master/slave mode ........................................................................................................................ 42
14.4 - Supplementary electric resistance heaters ........................................................................................................................... 43
15 - MAJOR SYSTEM COMPONENTS ............................................................................................................................................ 44
15.1 - Compressors ......................................................................................................................................................................... 44
15.2 - Lubricant................................................................................................................................................................................ 44
15.3 - Air evaporator/condenser ...................................................................................................................................................... 44
15.4 - Fans ...................................................................................................................................................................................... 44
15.5 - Electronic expansion valve (EXV) ......................................................................................................................................... 44
15.6 - Moisture indicator .................................................................................................................................................................. 44
15.7 - Filter drier .............................................................................................................................................................................. 44
15.8 - Water evaporator/condenser ................................................................................................................................................. 45
15.9 - Refrigerant............................................................................................................................................................................. 45
15.10 - High-pressure safety switch ................................................................................................................................................ 45
15.11 - Storage tank ........................................................................................................................................................................ 45
15.12 - Four-way valve .................................................................................................................................................................... 45
15.13 - Control box .......................................................................................................................................................................... 45
16 - OPTIONS ................................................................................................................................................................................... 46
17 - SPECIFIC DETAILS FOR UNITS WITH A FAN WITH AVAILABLE STATIC PRESSURE (30RQSY) ..................................... 48
18 - PARTIAL HEAT RECLAIM USING DESUPER-HEATERS (OPTION 49) ................................................................................. 49
18.1 - Physical data, 30RQS/30RQSY units with partial heat reclaim using desuperheaters (option 49) ....................................... 49
18.2 - Installation and operation of the heat reclaim with desuperheater option ............................................................................. 50
18.3 - Installation ............................................................................................................................................................................. 51
18.4 - Control configuration with the desuperheater option ............................................................................................................. 51
18.5 - Operating limits ..................................................................................................................................................................... 51
19 - BRINE OPTION (OPTION 5B & OPTION 6B) ........................................................................................................................... 52
19.1 - Frost protection ..................................................................................................................................................................... 52
20 - STANDARD MAINTENANCE .................................................................................................................................................... 53
20.1 - Level 1 maintenance ............................................................................................................................................................. 53
20.2 - Level 2 maintenance ............................................................................................................................................................. 53
20.3 - Level 3 (or higher) maintenance............................................................................................................................................ 53
20.4 - Tightening torques for the main electrical connections ......................................................................................................... 54
20.5 - Tightening torques for the main bolts and screws ................................................................................................................. 54
20.6 - Air heat exchanger ................................................................................................................................................................ 54
20.7 - Water heat exchanger maintenance ..................................................................................................................................... 54
20.8 - Refrigerant volume ................................................................................................................................................................ 54
20.9 - Characteristics of R-410A...................................................................................................................................................... 55
21 - START-UP CHECKLIST FOR 30RQS/30RQSY HEAT PUMPS (USE FOR JOB FILE) ........................................................... 56
The illustrations in this document are for illustrative purposes only and not part of any offer for sale or contract. The manufacturer
reserves the right to change the design at any time without notice.
3
Advertisement
Table of Contents
