Technical data

© MHS Boilers Ltd
221106 Draft Copy E&OE
27
[#] Description Range 150 & 225
Standalone
150 & 225
Master
Cascade
124 HWS Charging Cycles Per 24 Hour Period
0. One Per Day with 2.5 Hour Forward Shift from
Heating Time Switch Setting
1. Several Per Day with 1 Hour Forwarding Shifting
from Heating Time Switch Setting
0-1 1 1
125 HWS Temperature Control
0. QAZ21 Sensor
1. Volt Free Enable via Thermostat
0-1 0 0
126 System Flow Temperature Boost When HWS Enabled 0-30 20 20
127 HWS Priority / Shifting
0. Absolute Priority
1. Shifting Priority. Heating Reduced to Increase HWS
Recovery
2. No Priority. HWS and Heating Operate in parallel
3. Shifting / Absolute Heating Switched OFF, Mixing
Circuit Decreased (RVA46) to Increase HWS Recovery.
0-3 1 1
130 Hours Of Operation Prior to Sequence Rotation 10-990 10 10
131 Changeover Sequence Program
0. No Exemptions
1. The First Module is Exempt
2. The Last Module is Exempt
3. The First and Last Modules are Exempt
0-3 0 0
132 Module Designated as Fixed Lead Unit 00.1-16.3 --- ---
133 Cascade Enable Delay Time 1-120 1 1
134 Anti Cycling Time (Seconds) 0-1800 30 30
140 LPB Control Address
0. Standalone Single RVA47 Manager
1. Master RVA47 Manager
2….16. Slave RVA47s Operating From Master RVA47
Manager
0-16 1 1
141 LPB Control Segment
0. Heat Generating Units (RVA47s)
1…14. Heat Consuming Units (RVA46s)
0-14 0 0
142 LPB Power Supply
0. Off
1. On
0-1 1 1
143 Operation of LPB Power Supply On/Off On On
144 Display of LPB Communication On/Off On On
145 Changeover Via LPB Connection
0. All Controllers in Same Segment
1. All Controllers in LPB System
0-1 1 1
146 Summer/Winter Changeover Via LPB
0. Local Control Only
1. Entire Control Via LPB
0-1 0 0
147 Central Standby Switching
0. Deactivated
1. Activated
0-1 0 0