Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS - Manual (Page 44)

Commercial Pool Heaters
44
OPERATION Continued
OPERATION AND DIAGNOSTIC
INDICATORS
The control panel has up to six indicating and diagnostic lights
to show all major steps of operation and control sensed
malfunctions. There are display indicators on the Operating
Temperature Control that give status information as well.
Figure 49 – Exterior Control Panel with
Operation/Diagnostic Lights and LCD Display
The display indicators on the Operating Temperature Control
point to text on the overlay (Figure 46). They indicate the
following:
Speed - This indicates that the speed setting is being displayed.
The speed setting controls the responsiveness of the 3-way
valve.
Open, Close - These indicators appear when the Operating
Temperature Control adjusts the position of the 3-way valve.
Active - This indicator appears when the pool heater supplies
heat to the pool.
Water Chemistry
Factors which affect pool water and, more importantly, the
efficiency of your new pool heater are:
1. Proper Filtration
2. Proper Circulation
3. Disinfection and Oxidation
4. pH Control and Total Alkalinity
5. Algae Control
6. Water Balance
The water chemistry of your pool changes daily due to natural
evaporation of the water and the addition of chemicals.
Chemicals are used to sanitize and control algae growth in the
pool. Their addition must be carefully monitored. The
accumulation of minerals or scale in the pool heater due to
a chemical imbalance will cause a non-warrantable failure
of the heat exchanger and its components. pH is an
important factor in maintaining proper balance in your pool
water. pH is the measurement of the acidity or alkalinity of
water. The following chart shows the recommended pH range
and what can happen when the pH increases or decreases from
the ideal of 7.2 to 7.8.
Figure 50 – pH Scale
If the pH becomes too high, it lowers the ability of chlorine to
destroy bacteria and algae, water can become cloudy, filter
elements may become blocked, and scale formation will occur
in the pool and heat exchanger. If the pH becomes too low the
water becomes acidic. You can have eye burn and skin
irritation, etching of the plaster, corrosion of metal fixtures and
the resulting stains on the plaster, degradation of sand and
gravel filters and corrosion of the copper tubes in the heat
exchanger.
Damage to the pool heater due to improper water balance
is non-warrantable.
We recommend using a commercial or professional test kit to
monitor the following levels to ensure proper operation of your
pool heater:
Code
Sequence
Condition Lights
Prepurge Operation of combustion air fans before
ignition.
Trial for Ignition Hot surface igniter 1 preparing to light
burners.
Heating Burners operating.
Service (if equipped) Service Indicator when option
purchased.
Alarm Indicates flame failure on either ignition
module and will indicate additional
alarms if the alarm of any failure option
is purchased.
TABLE-O
Status LED Diagnostic Codes