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## JAN 24 '97 11:41 

# c>L11"t-t Proposed ASHRAEIIESNA Addendum 90.1 n to ASHRAEIIESNA 90.1-1989 

# ASHRAE® STANDARD

ADDENDUM TO ASHRAEIlESNA 90.'·1989 

# Energy Efficient Design of New Buildings Except Low-Rise Residential Buildings

Second PUBLIC REVIEW DRAFT

C199S AmerIcan Society of Heating. Reftf98nn1ng and Air· Conditioning Engineers. Inc. All 

### righta reaarved.. AhhOugh reproduction ofdrafts during

### the public review period isencouragedtopromoteadditionalcomment. permlaslon must 

### be obtained to raprt)duce aU or any part of

### this doeumentfrom 

### the ASHRAE 

### Manager of Standards, 1791 TulDe Circle. NE. Atlllnta. GA 30329; (404) 

### 636-&100.


# AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING ENGINEERS, INC. 1791 Tullie Cin:le, HE •Atlanta GA 30329



## 703 525 0718 PAGE. 02

## Foreword to 

# 90.1n: PropOKd 

### ASHR.AEIIESNA 90,]" Addcodum to 

### ASKRAElIESNA 90.1-1989 Secood 

### Public bvi8w 

### Draft



# This addendum is beingproposed toprovide mere equilable treatmentfor service water heating equipment 

# IJy requiring hot WaIersupply boilers to meet Ihe same requirements 

# as water heaters. The reference to the testmethod for WaIer healers not covered by NAECA. has 

# been updmed. The 

# requiremenrs shall apply 10 

# hoIwaIersupply boilers with input rarings from 300,000Btulh to 12,500,000Btulh. Definitions are added 10 

# Ihe standardforwater heaIers, hoIwatersupply boilers. and

# boilers. Only lheproposed changes are openfor comment aIthis time. Deletions are indicaIed by strikeouts and additions are indicated by 

# double underlining (text) 

# orshading (Iable), unless otherwise Slated. Addendum: Add

# thefollowing definitions 10 

## 3.4: 

# walerheater: vessel in which water is heated and is withdrawn for use external to the system. 

# hot water supply boiler: a boiler used to heat 

# water_for purposes other than space heating. 

# boiler: self-contained appliance for supplying steam or hot water. 

# Change 11.4.2EquipmenJEfficiency 10 

# read: 11.4.2 Equipment Efficiency. Hot water supply boilers with inputs from 

## 300,000 to 

## 12,500,000 Broth and used solely for heating potable water, a:All water heaters, and hot water storage tanks 

## shall meet the criteria ofTable 11-1. Where multiple criteria are listed l 

# all criteria shall be met. Exception: Storage water heaters and hot water storage tanks 

## having more than 

## 140 gallons ofstorage capacity need not meet the standby loss (SL) or heat loss (HL) 

## requirements of Table 11-1 ifthe 

# tank surface area is thermally insulated to R-6.5 

## (R-12.S as ofJanuary 1, 

## 1992) and 

# ifa standing pilot light is not used.

JAN 24 '97 11:42 703 525 0718 PAGE. 03

### TABLE 11.1 

## Minimum Performance of Water Heating Equipment
Input

### to T

.. t Energy Thermal Standby Category Type Fuel 

### Input Rating 

### V T• 

### V T Ratio Methocf 

### Feetor'" Efficienc I.oss 

## (Btw'h'P't' y 

## %l'hr" E, Of. NAECA all elec1lic 512 kW aU' DOE Tast Pnx:.**~0.93-0.00**132V Covel1ild storage gas .575.000 

### BtuIh alf 10**~.62,().0019V** Water instantaneous gas S200.000Btulhc all CFR. 

### Part**~.62,().0019V** Heating storage oil 5105.000Bt....", all 

## 430Z**~.5g.0.0019V** Equipmenf instantaneous oil S210.000Bl""'" all**~0.59-0.0019V** pool heater gas/oil all all ANSI Z21.56- C!78"f. 1989- Other storage electric all all ANSI SO.30

...27NT Water**Z21.10.3.~** Heating storage! gas/oil 5155,000 

### BtuIh all <4.000**19~** ::7e"lo S1.3+114NT Equipment" instantaneous >155,000 BtuIh 

# an <4.000 C!78% Sl.3+9SN

.. <10**~4.000** ::80% 

# -**~10 ~,OOO** **~77"to** 

### S2.3+67N

.. hot waler 

### gas/oil**~.OOOand** <10**~.OOO ~eO%**  supply boilers 512,500,000 

### BtuIh**~10 ~4.000**  ANSI Z21.10.3, ::77% S2.3+67NT**1~** Unfired Storage Tanks all ::a6.5 Stulh

### oft Note f ·For detailed I1iIfel1ilnces see Section 14. I>Consistenl with National Appliance Energy Conservation Act (NAECA) 011987 and 

### covered by the 

### OOE water heater 

### efficiency test procedul1ilS. 'DOE Test Procedul1ils apply to electric and gas storage water heaters 

### with rated volumes 

### C!2O gallons and gas instantaneous water heaters with input ratings of 50,000 to 200,000 

### Bluth.
dAn except those water heaters covered by NAECA.
"When testing an electric storage water heater for standby loss using Ihe test procedure of 

### Section 2.9 of Z21 .10.3499Q1993"', Ihe electrical supply voltage shall be maintained within ±1% of the center of the vottage range specified on the water heater nameplate. Also, when needed for calculations. 111e thermal efficiency (E,) 

### shall be 98%. When testing an 

### oil water healer using 

### the test 

### procec:fures 01 

### Section 2.B and 2.9 

### of**Z21.10.3~1993"',** 

### the following 

### modifications WIll be made: A vertical len9111 of 

### Hue pipe shall 

### be connected to 

### the flue 

### gas outlet of 

### sufficient height 

### 10 establish the minimum 

### draft specified in the manufacturer's installation insl'NClions. All measurements 

### of oil consumption will be taken by instruments with an accuracyof il

### "10 or better. 

### The bumer 

### rate shall be adjusted to achieve an hourly 

### Btu input rete 

### within ±2% ofthe manufacture"s specified input rate with lhe CO, l1iIading as specified bythe manufac:1urer wi1h smoke no greater than , and 

### the fuel pump pressUI1il within ±1% of 1118 manufacturer's specification. " 'Heat loss oftank surface area (BtIih.ft') based on 80*Fwater-air lemperature difference. 

### gy is rated storage volume in gallons as specified bythe manufadurer. I 

# I I

"'IT is the storage volume in gallons as measured during the test 

### to determine Ihe standby loss. VT may differfrom V, but it is within tolerances allowed by the applicable Z21 and UL standards. Accordingly, for the purpose of estimating the standby loss requil1ilment using the rated volume shown on the rating plate, VT should be concemed 

## as no less than O.95V for 

### gas and oil waler heaters and no less than O.90V for electric water heaters.



## JPN 24 '97 11:42 

## 7133 525 0718 PAGE. 134