Universal Enterprise C75 Installation Manual

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C75

INSTRUCTION MANUAL

Introduction

The goal of combustion analysis is to maximize the energy obtained
from a fuel while minimizing the risk of toxic gases and additional main­tenance needs. Using an electronic combustion analyzer will give you
the needed values quickly for proper equipment set-up and tuning of
combustion equipment.

Common parameters to measure are CO2 and efficiency. This analyzer
measures O2, CO and flue temperature, and then calculates those. The
rotary selector makes choosing what is displayed fast, and easy, and
you can quickly move between parameters based on your needs.

This analyzer is designed for easy use, down to these simple steps

1 Power on the analyzer
2 Select the fuel
3 Place probe in the flue and measure combustion gases

More specific information on using the analyzer is included in this user
guide, including some basics of combustion.

Maximizing CO2 and efficiency has been used as a general guide, but
UEi recommends consulting technical information from the equipment
manufacture for targeted gas values.

Features include

• Measures: Flue temperature, oxygen, carbon monoxide (CO)

• Calculates: Carbon dioxide, gross efficiency, excess air, CO air free

• Unique DMM style rotary selector

• Real time clock

• CO readings to 1 ppm

• Large 2 line back-lit display

• Infrared printer port

• User programmable header

• 16 memory positions

Safety Notes

Before using this meter, read all safety information carefully. In this
manual the word "WARNING" is used to indicate conditions or actions
that may pose physical hazards to the user. The word "CAUTION" is
used to indicate conditions or actions that may damage this instrument.

WARNING!

This analyzer extracts combustion gases that may be toxic in relatively
low concentrations. These gases are exhausted from the back of the
instrument. This instrument must only be used in well-ventilated loca­tions. It must only be used by trained and competent persons
after due consideration of all the potential hazards.

C o n t r ols and Indicators

1. Display

2. Infrared Print Emitter

3. ON/OFF: Turns analyzer ON and OFF.

4. Print/Back-Light: Print data - press briefly until “PRINTING”
appears. Back-light - press and hold to toggle back-light ON or OFF.

5. Pump: Turns pump ON and OFF. (Readings change to “ - - - -”
when the pump is OFF )

6. Hold/Store: Hold - Freezes reading on display. Entire
display flashes.
Store - press and hold for 2 seconds to store data in memory.

7. Rotary Selector

8. Particle Filter: (Inside water tra p )

9. Water Trap

10. Analyzer Connections

C75-MAN P. 1

2

1

3

4

5
6

7

8

9

10

Probe Configuration

Operating Instructions

Before Use Each Time

• The particle filter is not dirty

• The water trap and probe line are empty of water

• All hose and thermocouple connections are properly made

• The flue gas probe is sampling ambient FRESH air

• The water trap is fitted correctly to the instrument

• The Flue temperature probe is connected if required to set the

inlet air temperature
NOTE: If using ambient air for combustion leave disconnected

Switch ON the instrument by pressing “ON/OFF“.

After switch-on, the analyzer will scroll through the following
information while performing a zero countdown:

• Currently Set Date

• Currently Set Time

• Remaining Battery Level

• Fuel Selected

• Model and Analyzer Firmware Level

NOTE: The count begins at 59 seconds, and will display the parameter
selected with the rotary knob when the sensors are detected as stable.
If the analyzer will not auto-zero, the sensors are in need of replace­ment and the unit should be returned to the authorized service center.

Battery Replacement

This meter has been designed for use with both alkaline and
rechargeable Nickel Metal Hydride (NiMH) batteries. No other types
are recommended. The analyzer is supplied with 4 “AA” size alkaline
batteries. These should be installed into the instrument as shown
below (Fig 1) and indicated on the back of the unit.

CAUTION!

Take great care when installing the batteries to observe correct polarity.
Always check the meter for operation immediately after installing
new batteries.

Using Re-Chargeable Batteries

The battery charger must only be used when NiMH batteries are fitted.

Alkaline batteries are not re-Chargeable. Attempting to recharge alkaline
batteries may result in damage to the product and may create a fire risk.

Charging

Ensure that you use the correct charger. This unit uses a 9V DC
regulated charger.

Ensure that the batteries are fitted in the correct manner, and then
charge for at least 16 hours. Subsequent charges should be overnight.
NiMH batteries may be charged at any time, even for short periods to
conduct testing.

WARNING!

Under NO c i r cumstance should you expose batteries to ex t reme heat or
f i r e as they may explode and cause injury. Always dispose of old batteries
p romptly in a manner consistent with local disposal re g u l a t i o n s .

C75-MAN P. 2

Type K-Thermometer plug

Stainless steel shaft

Depth stop cone

9 foot neoprene hose

Flue temperature probe connector

Flue gas connector

Fit probe connector to end of
tube using barbed end.

(Fig 1)

Selecting Fuel

To set the fuel simply rotate the selector to “FUEL” then press the “U P”
or “DOWN” arrows to scroll through the choices. When the correct fuel
is displayed on the bottom line press “ENTER” to choose this fuel.

Symbol Legend

Setting Inlet Temperature

During the automatic calibration sequence the burner INLET (Ti)
temperature used in the NET temperature calculation is stored in the
analyzer. There are two methods of storing the INLET temperature.

A. Without the flue probe connected temperature inside the analyzer

is used (ambient temperature).

B. If the flue probe is connected the temperature of the probe tip is

used. This can be useful when the temperature of the air entering
the burner is different than the ambient temperature of the room.

NOTE: On ducted inlets, insert the probe tip into the inlet air during the
zero countdown. The analyzer will then store this temperature as the
ambient (inlet) for use in efficiency calculations. Do not sample flue gas
during the zero countdown.

WARNING!

If the INLET temperature is set incorrectly, then errors will be made in
the calculation of net temperature and efficiently.

Sampling the Flue Gas

Once the automatic calibration procedure has been completed and the
specific fuel has been selected (see menu options) the probe can be
inserted into the desired sampling point.

It is recommended that the sampling point be located at least two flue
diameters downstream of any bend, as close to the source as possible,
and that the probe tip is in the center of the flue. With balanced flues
and other domestic units the probe should be positioned far enough
into the flue so that no air can “back flush” into the probe.

Symbol Description Notes

Efficiency (gross) Calculated percentage efficiency based on

net temperature, O2 value and fuel selected.

Battery Level Battery level indication with percentage

remaining.

Excess Air Theoretical amount of air in excess of level

needed to completely burn fuel.

Losses Losses calculated from Oxygen and type of

fuels. Displays reading during a combustion

test. “- - - -” is displayed while in fresh air.
∆T Delta Temperature Net Te m p e r ature of Flue and Ambient (or inlet).
TF Flue Temperature Measure of Flue Temperature.

Analyzer Connections

NOTE: Take care when inserting the temperature probes as the pins are
polarized. Insert with the smaller pin (+) to the right. A view of the
sockets is shown below.

Automatic Calibration

During this sequence the analyzer pumps fresh air into the Oxygen and
CO (C75 only) sensors to allow them to be set to 20.9% and zero
respectively. See “Setting Inlet Temperature) for information on options.

Changing the Display

The parameters on the display are selected from the following using the
rotary selector knob. Certain items are available on the AUX display by
selecting through the menu.

Selector Top Line Bottom Line

Fuel Fuel Selected Fuel Indicator

(Scroll selection with the up/down • NAT GAS Natural Gas
arrows and then press the enter key • PROPANE
“HOLD” to choose • BUTANE

• L OIL Light Oil

• LPG Liquid
Petroleum Gas

• H OIL Heavy Oil

Aux User selectable line 1 User selectable line 2
Status Fuel selected Battery level
CO2 / X-Air CO2 in percentage Excess Air % (represented by

Greek Lambda )

Eff (Efficiency ) Flue Te m p e rature (TF) E f f i c i e n cy % (represented by

Greek eta )
T Flue TF (Flue temp) Net Te m p e r ature (∆T )
T Amb (Ambient) Ambient Temp (or set inlet tempera t u r e Net Te m p e r ature (∆T )

See page 7)
O 2 / CO Measured O2% Measured CO ppm
Air Fr e e Calculated value for

CO Air Free (see page 17)
Mem (Memory ) Used to view or delete stored readings
D a t e / T i m e D a t e T i m e
S e t u p Used to setup instrument Adjustment position for Time,

Date, Te m p e r ature scale,

Screen Contrast, Language,

Header, Aux selector display,

or entering Service mode.

C75-MAN P. 3

Flue (Tf) temperature
socket

Mains adapter socket Flue gas inlet

Water trap drain plug