LAARS Rheos+ RHHV - Install and Operating Manual - Manual (Page 6)

Rheos+ Boiler and Water Heater Page 5
Section 1
GENERAL INFORMATION
USING THIS MANUAL – Because the
Rheos+ Boilers and Rheos+ Water Heaters are
identical appliances, with the exception of materials
of manufacture, labels and ultimate use application,
this manual provides information for the proper
installation, operation and maintenance of both
products. Where differences exist between the
application of the appliances and their operation,
the sections pertinent to only one appliance or the
other will be so identified.
WARNING
The Rheos+ hydronic, boiler or water heater must
be installed in accordance with the procedures
detailed in this manual, or the LAARS Heating
Systems warranty will be voided. The installation
must conform to the requirements of the local
jurisdiction having authority, and, in the United
States, to the latest edition of the National Fuel
Gas Code, ANSI Z223.1/NFPA54. In Canada,
the installation must conform to the latest edition
of CSA B149.1 Natural Gas and Propane Gas
Installation Code, and/or local codes. Where
required by the authority having jurisdiction, the
installation of Rheos+ boilers must conform to
the Standard for Controls and Safety Devices
for Automatically Fired Boilers, ANSI/ASME
CSD-1. Any modifications to the boiler, its gas
controls, or wiring may void the warranty. If field
conditions require modifications, consult the factory
representative before initiating such modifications.
1.1 Introduction
This manual provides information necessary for
the installation, operation, and maintenance of LAARS
Heating Systems Rheos+ (copper tube or cupronickel
tubes) appliances. Read it carefully before installation.
All application and installation procedures
should be reviewed completely before proceeding
with the installation. Consult the LAARS Heating
Systems factory, or local factory representative, with
any problems or questions regarding this equipment.
Experience has shown that most operating problems
are caused by improper installation.
The Rheos+ appliance is protected against over
pressurization. A pressure relief valve is fitted to
all appliances. It is installed inside the jacket, at the
water outlet of the unit. (See Sections 4A and 4B for
instructions on how to install a relief valve outlet.)
IMPORTANT: The inlet gas pressure to the appliance
must not exceed 13" W.C. (3.2kPa).
All installations must be made in accordance
with 1) American National Standard Z223.1/NFPA54-
Latest Edition “National Fuel Gas Code” or 2) CSA
B149.1 “Natural Gas and Propane Installation Code”
and with the requirement of the local utility or other
authorities having jurisdiction. Such applicable
requirements take precedence over the general
instructions contained herein.
All electrical wiring is to be done in accordance
with the local codes, or in the absence of local codes,
with: 1) The National Electrical Code ANSI/NFPA No.
70-latest Edition, or 2) CSA STD. C22.1 “Canadian
Electrical Code - Part 1”. This appliance must be
electrically grounded in accordance with these codes.
1.2 Model Identification
Consult the rating plate on the unit. The
following information describes the model number
structure.
(1-2) Model Series Designation
R H = Rheos+ mid-sized commercial
(3) Model Efficiency
H = High Efficiency (condensing)
(4) Usage
H = Hydronic
V = Volume Water
(5-8) Size
1 2 0 0 = 1,200,000 BTU/hr input
1 6 0 0 = 1,600,000 BTU/hr input
2 0 0 0 = 2,000,000 BTU/hr input
2 4 0 0 = 2,400,000 BTU/hr input
(9) Fuel
N = Natural Gas
P = Liquid Propane
(10) Altitude
A = Universal Altitude (0' to 10,000') (0m to 3050m)
(11) Location
I = Indoor
Model Designation
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
R H H 0 0 A I F
SERIES
R H H
USAGE
H
V
SIZE
1 2 0 0
1 6 0 0
2 0 0 0
2 4 0 0
FUEL
N
P
ALTITUDE
A
FIRING
MODE
F
LOCATION
I
REVISION
1
2
HEAT
EXCHANGER
E
F
OPTION
CODES
X
A H
B N
F S