Page 3
Figure 1. Heater Identification (model nomenclature).
WARNING
This pool heater must be installed in accordance
with the procedures outlined in this manual. The
warranty does not apply to pool 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; ANS1 Z223.1,
National Electrical Code ANSI/NFPA 70 and/or in
Canada CAN1-B149 requirement.
When required by the authority having jurisdiction,
the installation must conform to American Society of
Mechanical Engineers safety codes for controls and
safety devices for automatically fired heaters No.
CSD-1, and in Canada CGA 3.3. Any modification to
the water heater, its gas controls, gas orifices, wiring
or draft diverter may void the Laars warranty. If field
conditions require such modifications, consult factory.
1.3 Heater Identification
Consult rating plate on the heating heater. Shown
in Figure 1 is a breakdown of the model nomenclature.
This commercial pool heater is available in two
configurations: an indoor version and an outdoor version.
Outdoor models are not available in Canada.
1.4 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 flow 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.
MightyTherm Pool Heater
REVISION
P
-PUMP (U.S.)
Q
-PUMP (CAN)
HEAT EXCHANGER
C
-GLASS LINED/COPPER
N
-GLASS LINED/CU-NI
A
-GLASS LINED/COPR REVRSD
M
-GLASS LINED/CU-NI REVRSD
Option Code
XX
- Standard
JX
- CSD-1
HL
- High & low gas
pressure switches
LC
- LWCO
& 100% lockout
LW
- LWCO
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-MBTU/h
0500
0600
0715
0850
1010
1200
1430
1670
1825
FIRING MODE
ON/OFF
1
2
3
4
5 6
7
8
9 10
11
12
13
14
15 16
MODEL
AP
- MIGHTY THERM POOL
SECTION 1.
General Information
1.1 Introduction
This manual provides information for the
installation and operation of Mighty Therm, model
AP pool heaters. 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 filed with
the carrier. The carrier, not the shipper, is responsible
for shortages and damage to the shipment whether
visible or concealed.
1.2 Warranty
Laars Heating Systems appliances are covered
by a limited warranty. Owners should submit online
warranty registration at
www.Laars.com
.
All warranty claims must be made to an authorized
Laars Heating Systems representative, directly to
Customer Service, or online at
www.Laars.com
.
Claims must include the serial number and model
number (this information can be found on the rating
plate), installation date, and name of the installer.
Shipping costs are not included in the warranty coverage.
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.
A P
C
