Raypak Xtherm 1005A, Инструкция по установке и эксплуатации

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NOTE: This dry contacts closure can come from a
room thermostat or a remote relay. No power of any
kind should be applied to either of these terminals.
Cascade Follower Pump
and Sensor Wiring
1. Once the primary boiler has been identified, addi-
tional boilers will be designated as follower boilers.
Ensure dip switch 2 on each follower VERSA is set
to the OFF/Down position.
2. The System and DHW pump outputs are not used
in the Cascade Follower configuration.
Fig. 29: VERSA Follower
Modbus BMS Communication
The VERSA IC control is equipped as standard with a
communications port for connectivity to building
automation via Modbus protocol. Refer to the VERSA
IC manual (5000.72) for further information.
Venting
General
Appliance Categories
Heaters are divided into four categories based on the
pressure produced in the exhaust and the likelihood of
condensate production in the vent.
Category I – A heater which operates with a non-positive vent
static pressure and with a vent gas temperature that avoids
excessive condensate production in the vent.
Category II – A heater which operates with a non-positive vent
static pressure and with a vent gas temperature that may
cause excessive condensate production in the vent.
Category III – A heater which operates with a positive vent
pressure and with a vent gas temperature that avoids exces-
sive condensate production in the vent.
Category IV – A heater which operates with a positive vent
pressure and with a vent gas temperature that may cause
excessive condensate production in the vent.
See Table L for appliance category requirements.
Use only the special gas vent pipes listed for use with
Category IV gas burning heaters, such as the AL29-4C
stainless steel vents offered by Heat Fab Inc. (800-
772-0739), Protech System, Inc. (800-766-3473),
Z-Flex (800-654-5600) or American Metal Products
(800-423-4270). Pipe joints must be positively sealed.
Follow the vent manufacturer’s installation instructions
carefully.
Centrotherm polypropylene vent material is approved
to be used on XTherm products. A field installed vent
adapter supplied by Raypak (option D-33) must be
used to ensure a proper seal of the flue and conden-
sate. The D-33 kit includes a required vent
temperature limit.
CAUTION: Proper installation of flue venting is
critical for the safe and efficient operation of the
heater.
NOTE: For additional information on appliance
categorization, see appropriate ANSI Z21 Standard
and the NFGC (U.S.), or B149 (Canada), or
applicable provisions of local building codes.
Alarm Connection
An alarm annunciator or light may be connected to the
alarm contacts on the boiler PIM™. The Alarm
Contacts are 3A rated dry contacts on a normally-open
relay that close during fault or lockout conditions, and
the maximum voltage across the contacts is 30 VAC or
30 VDC. See the Field Wiring as shown in Fig. 25.
In a cascade system, the alarm output of the master
boiler will be active if either the master boiler or follow-
er(s) have a lockout condition. The alarm output of the
follower boilers will only energize if a lockout condition
occurs on that specific boiler.