LAARS Mighty Therm AP (Sizes 500-1825) - Installation, Operation and Maintenance Instructions - Manual (Page 3)

Mighty Therm Commercial Pool Heating Boiler Page 3
Section 1
General Information
1.1 Introduction
This manual provides information for the installation
and operation of Laars Model AP pool heating boilers.
It is strongly recommended that all application and
installation procedures be reviewed completely before
proceeding with the installation. Consult the Laars
factory, or local factory representative, with any problems
or questions regarding this equipment. Experience has
shown that most problems are caused by improper
installation, not system design.
Some accessory items are shipped in separate packages.
Verify receipt of all packages listed on the packing slip.
Inspect everything for possible damage upon delivery,
and inform the carrier of any shortages or impairments.
Any such claims should be fi led with the carrier. The
carrier, not the shipper, is responsible for shortages and
damage to the shipment whether visible or concealed.
Figure 1. Heater Identifi cation (Model Nomenclature)
MODEL
AP-POOL
REVISION
P-PUMP (U.S.)
Q-PUMP (CAN)
HEAT EXCHANGER
C-GLASS LINED/COPPER
N-GLASS LINES/CU-NI
K-BRONZE/COPPER
S-BRONZE/CU-NI
VERSION
1 - 8 TUBE
B-10 TUBE
I-INDOOR
E-OUTDOOR
FUEL
N-NATURAL
P-PROPANE
IGNITION
04-SPARK 110V
09-SPARK 24V
11-SPARK 24V
16-STND. PILOT
SIZE
BTU/HR X 1000
0500
0600
0715
0850
0999
1010
1200
1430
1670
1825
C
FIRING MODE
ON/OFF
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Mechanical Engineers safety codes for controls and
safety devices for automatically fi red heaters No. CSD-1,
and in Canada CSA 3.3. Any modifi cation of the heater,
its gas controls, gas orifi ces, wiring or drafter diverter
may void the Laars warranty. If fi eld conditions require
such modifi cations, consult the factory.
1.2 Heater Identifi cation
Consult rating plate on the heater. Shown below is a
breakdown of the model nomenclature. Laars commercial
pool heating boilers are available in two confi gurations:
an indoor version and an outdoor version. Outdoor
models are not available in Canada.
1.3 Primary/Secondary Pump and Piping
All models are supplied with integrally mounted pumps.
The 1825 models use a 3/4 HP pump and all other models
are supplied with 1/2 HP pumps. These pumps are sized
for the pressure drop through the heat exchanger and
through the bypass piping as shown in Figure 10.
Any deviations from the arrangement shown may
increase the head on the pump, reduce fl ow and hinder
performance (see Section 2.7). For spas see Section 3.9.
This piping arrangement and the integral pump allow hot
water to be recirculated to the heater inlet, thus raising
the inlet temperature and greatly reducing condensation.
1.4 Certifi cations
All models are design-certifi ed by CSA for natural or
propane gas and conform to ASME Code requirement for
160 PSI water pressure.
1.5 Engineering Assistance
Consult the factory or distributor regarding any questions
or problems which arise in the specifi cation, installation
or operation of Laars equipment. An experienced
engineering staff is ready to assist in assuring the proper
performance and application of Laars products.
The warranty does not apply to heaters not installed or
operated in accordance with these procedures. Consult
local building and safety codes before proceeding with
work. The installation must conform to the requirements
of the authority having jurisdiction or, in the absence of
such requirements, to the latest edition of the National
Fuel Gas Code; ANSI Z223.1, National Electrical Code
ANSI/NFPA 70. In Canada, the installation must conform
with the latest edition of CSA B149 requirements.
When required by the authority having jurisdiction,
the installation must conform to American Society of
WARNING
The model AP commercial pool heater must
be used on potable water only. For heating
pools containing salt water, a specially
equipped heater must be used; consult your
distributor or factory representative. The
pool heater must be installed in accordance
with the procedures outlined in this manual.